90207870840 has 48 divisors (see below), whose sum is σ = 293175581400. Its totient is φ = 24055432128.

The previous prime is 90207870839. The next prime is 90207870853. The reversal of 90207870840 is 4807870209.

It is a super-2 number, since 2×90207870840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125288350 + ... + 125289069.

Almost surely, 2^90207870840 is an apocalyptic number.

90207870840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90207870840 is an abundant number, since it is smaller than the sum of its proper divisors (202967710560).

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

90207870840 is a wasteful number, since it uses less digits than its factorization.

90207870840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250577436 (or 250577429 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 90207870840 in words is "ninety billion, two hundred seven million, eight hundred seventy thousand, eight hundred forty".