197406720 has 520 divisors, whose sum is σ = 856319904. Its totient is φ = 42467328.

The previous prime is 197406707. The next prime is 197406733. The reversal of 197406720 is 27604791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (197406707) and next prime (197406733).

It is a super-3 number, since 3×197406720³ (a number of 26 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11612152 + ... + 11612168.

Almost surely, 2^197406720 is an apocalyptic number.

197406720 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 197406720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428159952).

197406720 is an abundant number, since it is smaller than the sum of its proper divisors (658913184).

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

197406720 is an equidigital number, since it uses as much as digits as its factorization.

197406720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 197406720 is about 14050.1501771333. The cubic root of 197406720 is about 582.2649447335.

The spelling of 197406720 in words is "one hundred ninety-seven million, four hundred six thousand, seven hundred twenty".