90388934 has 8 divisors (see below), whose sum is σ = 137107080. Its totient is φ = 44686576.

The previous prime is 90388933. The next prime is 90388937. The reversal of 90388934 is 43988309.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90388931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253724 + ... + 254079.

It is an arithmetic number, because the mean of its divisors is an integer number (17138385).

Almost surely, 2^90388934 is an apocalyptic number.

90388934 is a deficient number, since it is larger than the sum of its proper divisors (46718146).

90388934 is a wasteful number, since it uses less digits than its factorization.

90388934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507894.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 90388934 is about 9507.3095037450. The cubic root of 90388934 is about 448.7850916711.

The spelling of 90388934 in words is "ninety million, three hundred eighty-eight thousand, nine hundred thirty-four".