90290278 has 12 divisors (see below), whose sum is σ = 146655468. Its totient is φ = 41672280.

The previous prime is 90290273. The next prime is 90290279. The reversal of 90290278 is 87209209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90290273) 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 5 ways as a sum of consecutive naturals, for example, 133228 + ... + 133903.

It is an arithmetic number, because the mean of its divisors is an integer number (12221289).

Almost surely, 2^90290278 is an apocalyptic number.

90290278 is a deficient number, since it is larger than the sum of its proper divisors (56365190).

90290278 is a wasteful number, since it uses less digits than its factorization.

90290278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267159 (or 267146 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 90290278 is about 9502.1196582657. The cubic root of 90290278 is about 448.6217550837.

The spelling of 90290278 in words is "ninety million, two hundred ninety thousand, two hundred seventy-eight".