90421424 has 20 divisors (see below), whose sum is σ = 176086944. Its totient is φ = 44979648.

The previous prime is 90421423. The next prime is 90421433. The reversal of 90421424 is 42412409.

It is a junction number, because it is equal to n+sod(n) for n = 90421393 and 90421402.

It is not an unprimeable number, because it can be changed into a prime (90421423) 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 3 ways as a sum of consecutive naturals, for example, 11192 + ... + 17495.

Almost surely, 2^90421424 is an apocalyptic number.

It is an amenable number.

90421424 is a deficient number, since it is larger than the sum of its proper divisors (85665520).

90421424 is a wasteful number, since it uses less digits than its factorization.

90421424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28892 (or 28886 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 90421424 is about 9509.0180355282. The cubic root of 90421424 is about 448.8388566631.

The spelling of 90421424 in words is "ninety million, four hundred twenty-one thousand, four hundred twenty-four".