400077620 has 24 divisors (see below), whose sum is σ = 869135400. Its totient is φ = 154512512.

The previous prime is 400077607. The next prime is 400077653. The reversal of 400077620 is 26770004.

It can be written as a sum of positive squares in 4 ways, for example, as 1196836 + 398880784 = 1094^2 + 19972^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400077620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344315 + ... + 345474.

It is an arithmetic number, because the mean of its divisors is an integer number (36213975).

Almost surely, 2^400077620 is an apocalyptic number.

It is an amenable number.

400077620 is an abundant number, since it is smaller than the sum of its proper divisors (469057780).

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

400077620 is a wasteful number, since it uses less digits than its factorization.

400077620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689827 (or 689825 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 400077620 is about 20001.9404058706. The cubic root of 400077620 is about 736.8539557331.

The spelling of 400077620 in words is "four hundred million, seventy-seven thousand, six hundred twenty".