90406690 has 16 divisors (see below), whose sum is σ = 177526080. Its totient is φ = 32875120.

The previous prime is 90406669. The next prime is 90406691. The reversal of 90406690 is 9660409.

It is a super-2 number, since 2×90406690² = 16346739193512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90406691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410830 + ... + 411049.

It is an arithmetic number, because the mean of its divisors is an integer number (11095380).

Almost surely, 2^90406690 is an apocalyptic number.

90406690 is a deficient number, since it is larger than the sum of its proper divisors (87119390).

90406690 is a wasteful number, since it uses less digits than its factorization.

90406690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821897.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90406690 is about 9508.2432657142. The cubic root of 90406690 is about 448.8144761912.

The spelling of 90406690 in words is "ninety million, four hundred six thousand, six hundred ninety".