90640627 has 16 divisors (see below), whose sum is σ = 115766784. Its totient is φ = 68904000.

The previous prime is 90640609. The next prime is 90640673. The reversal of 90640627 is 72604609.

It is not a de Polignac number, because 90640627 - 2⁷ = 90640499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90640592 and 90640601.

It is not an unprimeable number, because it can be changed into a prime (90640727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11199 + ... + 17512.

It is an arithmetic number, because the mean of its divisors is an integer number (7235424).

Almost surely, 2^90640627 is an apocalyptic number.

90640627 is a deficient number, since it is larger than the sum of its proper divisors (25126157).

90640627 is a wasteful number, since it uses less digits than its factorization.

90640627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28770.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 90640627 is about 9520.5371172009. The cubic root of 90640627 is about 449.2012612869.

The spelling of 90640627 in words is "ninety million, six hundred forty thousand, six hundred twenty-seven".