397043067920 has 40 divisors (see below), whose sum is σ = 940542598296. Its totient is φ = 155820674048.

The previous prime is 397043067919. The next prime is 397043067923. The reversal of 397043067920 is 29760340793.

It can be written as a sum of positive squares in 4 ways, for example, as 6583050496 + 390460017424 = 81136^2 + 624868^2 .

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 (397043067923) 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 7 ways as a sum of consecutive naturals, for example, 46816877 + ... + 46825356.

Almost surely, 2^397043067920 is an apocalyptic number.

It is an amenable number.

397043067920 is an abundant number, since it is smaller than the sum of its proper divisors (543499530376).

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

397043067920 is a wasteful number, since it uses less digits than its factorization.

397043067920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93642299 (or 93642293 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 50.

The spelling of 397043067920 in words is "three hundred ninety-seven billion, forty-three million, sixty-seven thousand, nine hundred twenty".