90424402 has 4 divisors (see below), whose sum is σ = 135636606. Its totient is φ = 45212200.

The previous prime is 90424351. The next prime is 90424417. The reversal of 90424402 is 20442409.

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., 45279441 + 45144961 = 6729^2 + 6719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22606099 + ... + 22606102.

Almost surely, 2^90424402 is an apocalyptic number.

90424402 is a deficient number, since it is larger than the sum of its proper divisors (45212204).

90424402 is a wasteful number, since it uses less digits than its factorization.

90424402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45212203.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 90424402 is about 9509.1746224370. The cubic root of 90424402 is about 448.8437840626.

The spelling of 90424402 in words is "ninety million, four hundred twenty-four thousand, four hundred two".