397421042472 has 48 divisors (see below), whose sum is σ = 1105439168340. Its totient is φ = 128893310208.

The previous prime is 397421042471. The next prime is 397421042479. The reversal of 397421042472 is 274240124793.

397421042472 is a `hidden beast` number, since 3 + 9 + 7 + 4 + 210 + 424 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 394703088516 + 2717953956 = 628254^2 + 52134^2 .

It is not an unprimeable number, because it can be changed into a prime (397421042471) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 74588373 + ... + 74593700.

Almost surely, 2^397421042472 is an apocalyptic number.

It is an amenable number.

397421042472 is an abundant number, since it is smaller than the sum of its proper divisors (708018125868).

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

397421042472 is a wasteful number, since it uses less digits than its factorization.

397421042472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149182122 (or 149182115 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 397421042472 in words is "three hundred ninety-seven billion, four hundred twenty-one million, forty-two thousand, four hundred seventy-two".