397862620 has 12 divisors (see below), whose sum is σ = 835511544. Its totient is φ = 159145040.

The previous prime is 397862609. The next prime is 397862623. The reversal of 397862620 is 26268793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397862623) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9946546 + ... + 9946585.

It is an arithmetic number, because the mean of its divisors is an integer number (69625962).

Almost surely, 2^397862620 is an apocalyptic number.

It is an amenable number.

397862620 is an abundant number, since it is smaller than the sum of its proper divisors (437648924).

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

397862620 is a wasteful number, since it uses less digits than its factorization.

397862620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19893140 (or 19893138 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 397862620 is about 19946.4939275052. The cubic root of 397862620 is about 735.4915927089.

It can be divided in two parts, 3978 and 62620, that multiplied together give a triangular number (249102360 = T₂₂₃₂₀).

The spelling of 397862620 in words is "three hundred ninety-seven million, eight hundred sixty-two thousand, six hundred twenty".