312492780 has 36 divisors (see below), whose sum is σ = 947895312. Its totient is φ = 83331360.

The previous prime is 312492773. The next prime is 312492781. The reversal of 312492780 is 87294213.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (312492781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867856 + ... + 868215.

Almost surely, 2^312492780 is an apocalyptic number.

312492780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312492780 is an abundant number, since it is smaller than the sum of its proper divisors (635402532).

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

312492780 is a wasteful number, since it uses less digits than its factorization.

312492780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736086 (or 1736081 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 312492780 is about 17677.4653160457. The cubic root of 312492780 is about 678.5991779498.

The spelling of 312492780 in words is "three hundred twelve million, four hundred ninety-two thousand, seven hundred eighty".