90278787312 has 60 divisors (see below), whose sum is σ = 288748822960. Its totient is φ = 25793938944.

The previous prime is 90278787301. The next prime is 90278787331. The reversal of 90278787312 is 21378787209.

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, 44780137 + ... + 44782152.

Almost surely, 2^90278787312 is an apocalyptic number.

It is an amenable number.

90278787312 is an abundant number, since it is smaller than the sum of its proper divisors (198470035648).

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

90278787312 is a wasteful number, since it uses less digits than its factorization.

90278787312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89562310 (or 89562301 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

It can be divided in two parts, 902787 and 87312, that added together give a palindrome (990099).

The spelling of 90278787312 in words is "ninety billion, two hundred seventy-eight million, seven hundred eighty-seven thousand, three hundred twelve".