90233428 has 6 divisors (see below), whose sum is σ = 157908506. Its totient is φ = 45116712.

The previous prime is 90233383. The next prime is 90233447. The reversal of 90233428 is 82433209.

It can be written as a sum of positive squares in only one way, i.e., 74960964 + 15272464 = 8658^2 + 3908^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90233428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11279175 + ... + 11279182.

Almost surely, 2^90233428 is an apocalyptic number.

It is an amenable number.

90233428 is a deficient number, since it is larger than the sum of its proper divisors (67675078).

90233428 is a wasteful number, since it uses less digits than its factorization.

90233428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22558361 (or 22558359 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 90233428 is about 9499.1277494305. The cubic root of 90233428 is about 448.5275791953.

The spelling of 90233428 in words is "ninety million, two hundred thirty-three thousand, four hundred twenty-eight".