402805490 has 32 divisors (see below), whose sum is σ = 732473280. Its totient is φ = 159482304.

The previous prime is 402805489. The next prime is 402805523. The reversal of 402805490 is 94508204.

402805490 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549164 + ... + 549896.

It is an arithmetic number, because the mean of its divisors is an integer number (22889790).

Almost surely, 2^402805490 is an apocalyptic number.

402805490 is a deficient number, since it is larger than the sum of its proper divisors (329667790).

402805490 is a wasteful number, since it uses less digits than its factorization.

402805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 402805490 is about 20070.0146985497. The cubic root of 402805490 is about 738.5248736883.

The spelling of 402805490 in words is "four hundred two million, eight hundred five thousand, four hundred ninety".