406624540 has 36 divisors (see below), whose sum is σ = 993328056. Its totient is φ = 139413792.

The previous prime is 406624507. The next prime is 406624549. The reversal of 406624540 is 45426604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406624549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206482 + ... + 208441.

It is an arithmetic number, because the mean of its divisors is an integer number (27592446).

Almost surely, 2^406624540 is an apocalyptic number.

It is an amenable number.

406624540 is an abundant number, since it is smaller than the sum of its proper divisors (586703516).

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

406624540 is a wasteful number, since it uses less digits than its factorization.

406624540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414946 (or 414937 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 406624540 is about 20164.9334241400. The cubic root of 406624540 is about 740.8515519662.

The spelling of 406624540 in words is "four hundred six million, six hundred twenty-four thousand, five hundred forty".