90415020 has 24 divisors (see below), whose sum is σ = 253162224. Its totient is φ = 24110656.

The previous prime is 90415019. The next prime is 90415037. The reversal of 90415020 is 2051409.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753399 + ... + 753518.

It is an arithmetic number, because the mean of its divisors is an integer number (10548426).

Almost surely, 2^90415020 is an apocalyptic number.

It is an amenable number.

90415020 is an abundant number, since it is smaller than the sum of its proper divisors (162747204).

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

90415020 is a wasteful number, since it uses less digits than its factorization.

90415020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506929 (or 1506927 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 90415020 is about 9508.6812965837. The cubic root of 90415020 is about 448.8282602367.

Adding to 90415020 its reverse (2051409), we get a palindrome (92466429).

The spelling of 90415020 in words is "ninety million, four hundred fifteen thousand, twenty".