400315536 has 120 divisors (see below), whose sum is σ = 1166588280. Its totient is φ = 127991808.

The previous prime is 400315523. The next prime is 400315547. The reversal of 400315536 is 635513004.

It can be written as a sum of positive squares in 4 ways, for example, as 188787600 + 211527936 = 13740^2 + 14544^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1073046 + ... + 1073418.

It is an arithmetic number, because the mean of its divisors is an integer number (9721569).

Almost surely, 2^400315536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400315536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583294140).

400315536 is an abundant number, since it is smaller than the sum of its proper divisors (766272744).

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

400315536 is a wasteful number, since it uses less digits than its factorization.

400315536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 400315536 is about 20007.8868449419. The cubic root of 400315536 is about 736.9999895674. Note that the first 4 decimals are identical.

The spelling of 400315536 in words is "four hundred million, three hundred fifteen thousand, five hundred thirty-six".