397554872240 has 40 divisors (see below), whose sum is σ = 978686556480. Its totient is φ = 149667716096.

The previous prime is 397554872237. The next prime is 397554872243. The reversal of 397554872240 is 42278455793.

It is an interprime number because it is at equal distance from previous prime (397554872237) and next prime (397554872243).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (397554872243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146158520 + ... + 146161239.

It is an arithmetic number, because the mean of its divisors is an integer number (24467163912).

Almost surely, 2^397554872240 is an apocalyptic number.

It is an amenable number.

397554872240 is an abundant number, since it is smaller than the sum of its proper divisors (581131684240).

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

397554872240 is a wasteful number, since it uses less digits than its factorization.

397554872240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292319789 (or 292319783 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 56.

The spelling of 397554872240 in words is "three hundred ninety-seven billion, five hundred fifty-four million, eight hundred seventy-two thousand, two hundred forty".