90442368 has 48 divisors (see below), whose sum is σ = 260260650. Its totient is φ = 30147072.

The previous prime is 90442367. The next prime is 90442409. The reversal of 90442368 is 86324409.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 34012224 = 7512^2 + 5832^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (90442367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38103 + ... + 40406.

Almost surely, 2^90442368 is an apocalyptic number.

It is an amenable number.

90442368 is an abundant number, since it is smaller than the sum of its proper divisors (169818282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90442368 is a wasteful number, since it uses less digits than its factorization.

90442368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78529 (or 78514 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 90442368 is about 9510.1192421546. The cubic root of 90442368 is about 448.8735083156.

The spelling of 90442368 in words is "ninety million, four hundred forty-two thousand, three hundred sixty-eight".