90405338 has 4 divisors (see below), whose sum is σ = 135608010. Its totient is φ = 45202668.

The previous prime is 90405323. The next prime is 90405347. The reversal of 90405338 is 83350409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86174089 + 4231249 = 9283^2 + 2057^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22601333 + ... + 22601336.

Almost surely, 2^90405338 is an apocalyptic number.

90405338 is a deficient number, since it is larger than the sum of its proper divisors (45202672).

90405338 is a wasteful number, since it uses less digits than its factorization.

90405338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45202671.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 90405338 is about 9508.1721692447. The cubic root of 90405338 is about 448.8122388929.

The spelling of 90405338 in words is "ninety million, four hundred five thousand, three hundred thirty-eight".