90142408 has 8 divisors (see below), whose sum is σ = 169017030. Its totient is φ = 45071200.

The previous prime is 90142379. The next prime is 90142421. The reversal of 90142408 is 80424109.

It can be written as a sum of positive squares in only one way, i.e., 61434244 + 28708164 = 7838^2 + 5358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5633893 + ... + 5633908.

Almost surely, 2^90142408 is an apocalyptic number.

It is an amenable number.

90142408 is a deficient number, since it is larger than the sum of its proper divisors (78874622).

90142408 is a wasteful number, since it uses less digits than its factorization.

90142408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11267807 (or 11267803 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 90142408 is about 9494.3355744359. The cubic root of 90142408 is about 448.3767159812.

The spelling of 90142408 in words is "ninety million, one hundred forty-two thousand, four hundred eight".