397354623220 has 24 divisors (see below), whose sum is σ = 836046352008. Its totient is φ = 158636774400.

The previous prime is 397354623157. The next prime is 397354623223. The reversal of 397354623220 is 22326453793.

It can be written as a sum of positive squares in 4 ways, for example, as 88027329636 + 309327293584 = 296694^2 + 556172^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397354623223) 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, 19056501 + ... + 19077340.

It is an arithmetic number, because the mean of its divisors is an integer number (34835264667).

Almost surely, 2^397354623220 is an apocalyptic number.

It is an amenable number.

397354623220 is an abundant number, since it is smaller than the sum of its proper divisors (438691728788).

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

397354623220 is a wasteful number, since it uses less digits than its factorization.

397354623220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38134371 (or 38134369 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 46.

The spelling of 397354623220 in words is "three hundred ninety-seven billion, three hundred fifty-four million, six hundred twenty-three thousand, two hundred twenty".