90440024 has 8 divisors (see below), whose sum is σ = 169575060. Its totient is φ = 45220008.

The previous prime is 90439997. The next prime is 90440027. The reversal of 90440024 is 42004409.

It is a happy number.

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

It is a super-2 number, since 2×90440024² = 16358795882241152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90440027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5652494 + ... + 5652509.

Almost surely, 2^90440024 is an apocalyptic number.

It is an amenable number.

90440024 is a deficient number, since it is larger than the sum of its proper divisors (79135036).

90440024 is a wasteful number, since it uses less digits than its factorization.

90440024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305009 (or 11305005 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 90440024 is about 9509.9960042053. The cubic root of 90440024 is about 448.8696304554.

The spelling of 90440024 in words is "ninety million, four hundred forty thousand, twenty-four".