406036520 has 32 divisors (see below), whose sum is σ = 938277000. Its totient is φ = 158024448.

The previous prime is 406036513. The next prime is 406036529. The reversal of 406036520 is 25630604.

It can be written as a sum of positive squares in 4 ways, for example, as 382046116 + 23990404 = 19546^2 + 4898^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 406036520.

It is not an unprimeable number, because it can be changed into a prime (406036529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135695 + ... + 138654.

Almost surely, 2^406036520 is an apocalyptic number.

406036520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406036520 is an abundant number, since it is smaller than the sum of its proper divisors (532240480).

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

406036520 is a wasteful number, since it uses less digits than its factorization.

406036520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274397 (or 274393 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 406036520 is about 20150.3478878157. The cubic root of 406036520 is about 740.4942643896.

The spelling of 406036520 in words is "four hundred six million, thirty-six thousand, five hundred twenty".