90406902 has 16 divisors (see below), whose sum is σ = 190330560. Its totient is φ = 28549512.

The previous prime is 90406879. The next prime is 90406909. The reversal of 90406902 is 20960409.

It is a self number, because there is not a number n which added to its sum of digits gives 90406902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90406909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396408 + ... + 396635.

It is an arithmetic number, because the mean of its divisors is an integer number (11895660).

Almost surely, 2^90406902 is an apocalyptic number.

90406902 is an abundant number, since it is smaller than the sum of its proper divisors (99923658).

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

90406902 is a wasteful number, since it uses less digits than its factorization.

90406902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793067.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 90406902 is about 9508.2544139290. The cubic root of 90406902 is about 448.8148270082.

The spelling of 90406902 in words is "ninety million, four hundred six thousand, nine hundred two".