90634278 has 32 divisors (see below), whose sum is σ = 209309184. Its totient is φ = 25627392.

The previous prime is 90634273. The next prime is 90634289. The reversal of 90634278 is 87243609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90634273) 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, 7050 + ... + 15197.

It is an arithmetic number, because the mean of its divisors is an integer number (6540912).

Almost surely, 2^90634278 is an apocalyptic number.

90634278 is an abundant number, since it is smaller than the sum of its proper divisors (118674906).

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

90634278 is a wasteful number, since it uses less digits than its factorization.

90634278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22356.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 90634278 is about 9520.2036742918. The cubic root of 90634278 is about 449.1907728136.

The spelling of 90634278 in words is "ninety million, six hundred thirty-four thousand, two hundred seventy-eight".