198774972 has 84 divisors (see below), whose sum is σ = 569050776. Its totient is φ = 60225120.

The previous prime is 198774971. The next prime is 198774973. The reversal of 198774972 is 279477891.

198774972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198774971) and next prime (198774973).

It is a super-2 number, since 2×198774972² = 79022978987201568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198774971) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 28978 + ... + 35174.

It is an arithmetic number, because the mean of its divisors is an integer number (6774414).

Almost surely, 2^198774972 is an apocalyptic number.

198774972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198774972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284525388).

198774972 is an abundant number, since it is smaller than the sum of its proper divisors (370275804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198774972 is a wasteful number, since it uses less digits than its factorization.

198774972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230 (or 6213 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 198774972 is about 14098.7578176235. The cubic root of 198774972 is about 583.6071003043.

The spelling of 198774972 in words is "one hundred ninety-eight million, seven hundred seventy-four thousand, nine hundred seventy-two".