397723974240 has 96 divisors (see below), whose sum is σ = 1271529584640. Its totient is φ = 104476737024.

The previous prime is 397723974239. The next prime is 397723974253. The reversal of 397723974240 is 42479327793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6151360 + ... + 6215679.

It is an arithmetic number, because the mean of its divisors is an integer number (13245099840).

Almost surely, 2^397723974240 is an apocalyptic number.

397723974240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397723974240 is an abundant number, since it is smaller than the sum of its proper divisors (873805610400).

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

397723974240 is a wasteful number, since it uses less digits than its factorization.

397723974240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12367124 (or 12367116 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 57.

The spelling of 397723974240 in words is "three hundred ninety-seven billion, seven hundred twenty-three million, nine hundred seventy-four thousand, two hundred forty".