409145902 has 32 divisors (see below), whose sum is σ = 722304864. Its totient is φ = 171724800.

The previous prime is 409145899. The next prime is 409145939. The reversal of 409145902 is 209541904.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9502 + ... + 30142.

It is an arithmetic number, because the mean of its divisors is an integer number (22572027).

Almost surely, 2^409145902 is an apocalyptic number.

409145902 is a deficient number, since it is larger than the sum of its proper divisors (313158962).

409145902 is a wasteful number, since it uses less digits than its factorization.

409145902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20724.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 409145902 is about 20227.3552893106. The cubic root of 409145902 is about 742.3796670771.

The spelling of 409145902 in words is "four hundred nine million, one hundred forty-five thousand, nine hundred two".