400721606260 has 96 divisors (see below), whose sum is σ = 867896763552. Its totient is φ = 155355217920.

The previous prime is 400721606227. The next prime is 400721606273. The reversal of 400721606260 is 62606127004.

It can be written as a sum of positive squares in 16 ways, for example, as 251067136356 + 149654469904 = 501066^2 + 386852^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27565954 + ... + 27580486.

It is an arithmetic number, because the mean of its divisors is an integer number (9040591287).

Almost surely, 2^400721606260 is an apocalyptic number.

It is an amenable number.

400721606260 is an abundant number, since it is smaller than the sum of its proper divisors (467175157292).

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

400721606260 is a wasteful number, since it uses less digits than its factorization.

400721606260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14933 (or 14931 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 400721606260 in words is "four hundred billion, seven hundred twenty-one million, six hundred six thousand, two hundred sixty".