90640415 has 8 divisors (see below), whose sum is σ = 108858768. Its totient is φ = 72452160.

The previous prime is 90640411. The next prime is 90640439. The reversal of 90640415 is 51404609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90640415 - 2² = 90640411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90640411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257 + ... + 13466.

It is an arithmetic number, because the mean of its divisors is an integer number (13607346).

Almost surely, 2^90640415 is an apocalyptic number.

90640415 is a deficient number, since it is larger than the sum of its proper divisors (18218353).

90640415 is a wasteful number, since it uses less digits than its factorization.

90640415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 90640415 is about 9520.5259833688. The cubic root of 90640415 is about 449.2009110733.

The spelling of 90640415 in words is "ninety million, six hundred forty thousand, four hundred fifteen".