90431402 has 16 divisors (see below), whose sum is σ = 142324224. Its totient is φ = 43038000.

The previous prime is 90431399. The next prime is 90431417. The reversal of 90431402 is 20413409.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8174 + ... + 15737.

It is an arithmetic number, because the mean of its divisors is an integer number (8895264).

Almost surely, 2^90431402 is an apocalyptic number.

90431402 is a deficient number, since it is larger than the sum of its proper divisors (51892822).

90431402 is a wasteful number, since it uses less digits than its factorization.

90431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24005.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 90431402 is about 9509.5426809074. The cubic root of 90431402 is about 448.8553658383.

The spelling of 90431402 in words is "ninety million, four hundred thirty-one thousand, four hundred two".