90517078 has 32 divisors (see below), whose sum is σ = 146966400. Its totient is φ = 41660544.

The previous prime is 90517073. The next prime is 90517081. The reversal of 90517078 is 87071509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90517073) 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, 505593 + ... + 505771.

It is an arithmetic number, because the mean of its divisors is an integer number (4592700).

Almost surely, 2^90517078 is an apocalyptic number.

90517078 is a deficient number, since it is larger than the sum of its proper divisors (56449322).

90517078 is a wasteful number, since it uses less digits than its factorization.

90517078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 90517078 is about 9514.0463526304. The cubic root of 90517078 is about 448.9970717547.

It can be divided in two parts, 9051 and 7078, that added together give a square (16129 = 127²).

The spelling of 90517078 in words is "ninety million, five hundred seventeen thousand, seventy-eight".