397030557978 has 48 divisors (see below), whose sum is σ = 863691934560. Its totient is φ = 131811751008.

The previous prime is 397030557929. The next prime is 397030558031. The reversal of 397030557978 is 879755030793.

397030557978 is a `hidden beast` number, since 3 + 9 + 7 + 0 + 3 + 0 + 557 + 9 + 78 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13242801 + ... + 13272747.

It is an arithmetic number, because the mean of its divisors is an integer number (17993581970).

Almost surely, 2^397030557978 is an apocalyptic number.

397030557978 is an abundant number, since it is smaller than the sum of its proper divisors (466661376582).

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

397030557978 is a wasteful number, since it uses less digits than its factorization.

397030557978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32891 (or 32888 counting only the distinct ones).

The product of its (nonzero) digits is 50009400, while the sum is 63.

The spelling of 397030557978 in words is "three hundred ninety-seven billion, thirty million, five hundred fifty-seven thousand, nine hundred seventy-eight".