312199026840 has 64 divisors (see below), whose sum is σ = 1040663426400. Its totient is φ = 83253073536.

The previous prime is 312199026803. The next prime is 312199026871. The reversal of 312199026840 is 48620991213.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144535507 + ... + 144537666.

Almost surely, 2^312199026840 is an apocalyptic number.

312199026840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312199026840 is an abundant number, since it is smaller than the sum of its proper divisors (728464399560).

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

312199026840 is a wasteful number, since it uses less digits than its factorization.

312199026840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289073193 (or 289073183 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 312199026840 in words is "three hundred twelve billion, one hundred ninety-nine million, twenty-six thousand, eight hundred forty".