90408042 has 32 divisors (see below), whose sum is σ = 211483200. Its totient is φ = 28549584.

The previous prime is 90408041. The next prime is 90408077. The reversal of 90408042 is 24080409.

It is a super-2 number, since 2×90408042² = 16347228116547528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 90407997 and 90408015.

It is not an unprimeable number, because it can be changed into a prime (90408041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43033 + ... + 45084.

It is an arithmetic number, because the mean of its divisors is an integer number (6608850).

Almost surely, 2^90408042 is an apocalyptic number.

90408042 is an abundant number, since it is smaller than the sum of its proper divisors (121075158).

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

90408042 is a wasteful number, since it uses less digits than its factorization.

90408042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88147 (or 88141 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 90408042 is about 9508.3143616521. The cubic root of 90408042 is about 448.8167134672.

The spelling of 90408042 in words is "ninety million, four hundred eight thousand, forty-two".