90324540 has 36 divisors (see below), whose sum is σ = 273984984. Its totient is φ = 24086496.

The previous prime is 90324497. The next prime is 90324583. The reversal of 90324540 is 4542309.

90324540 is a `hidden beast` number, since 90 + 32 + 4 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (90324497) and next prime (90324583).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250722 + ... + 251081.

It is an arithmetic number, because the mean of its divisors is an integer number (7610694).

Almost surely, 2^90324540 is an apocalyptic number.

90324540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90324540 is an abundant number, since it is smaller than the sum of its proper divisors (183660444).

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

90324540 is a wasteful number, since it uses less digits than its factorization.

90324540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501818 (or 501813 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 90324540 is about 9503.9223481676. The cubic root of 90324540 is about 448.6784933251.

Adding to 90324540 its reverse (4542309), we get a palindrome (94866849).

The spelling of 90324540 in words is "ninety million, three hundred twenty-four thousand, five hundred forty".