90772540 has 12 divisors (see below), whose sum is σ = 190622376. Its totient is φ = 36309008.

The previous prime is 90772531. The next prime is 90772543. The reversal of 90772540 is 4527709.

It is a junction number, because it is equal to n+sod(n) for n = 90772496 and 90772505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90772543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269294 + ... + 2269333.

It is an arithmetic number, because the mean of its divisors is an integer number (15885198).

Almost surely, 2^90772540 is an apocalyptic number.

It is an amenable number.

90772540 is an abundant number, since it is smaller than the sum of its proper divisors (99849836).

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

90772540 is a wasteful number, since it uses less digits than its factorization.

90772540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538636 (or 4538634 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 90772540 is about 9527.4624113664. The cubic root of 90772540 is about 449.4190692961.

The spelling of 90772540 in words is "ninety million, seven hundred seventy-two thousand, five hundred forty".