197554140 has 144 divisors (see below), whose sum is σ = 710341632. Its totient is φ = 45147456.

The previous prime is 197554121. The next prime is 197554141. The reversal of 197554140 is 41455791.

197554140 is a `hidden beast` number, since 1 + 9 + 75 + 541 + 40 = 666.

It is a super-2 number, since 2×197554140² = 78055276462279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 197554095 and 197554104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197554141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31117 + ... + 36923.

It is an arithmetic number, because the mean of its divisors is an integer number (4932928).

Almost surely, 2^197554140 is an apocalyptic number.

197554140 is a gapful number since it is divisible by the number (10) 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 197554140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355170816).

197554140 is an abundant number, since it is smaller than the sum of its proper divisors (512787492).

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

197554140 is a wasteful number, since it uses less digits than its factorization.

197554140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838 (or 5824 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 197554140 is about 14055.3954053239. The cubic root of 197554140 is about 582.4098505396.

The spelling of 197554140 in words is "one hundred ninety-seven million, five hundred fifty-four thousand, one hundred forty".