312690642 has 32 divisors (see below), whose sum is σ = 689912640. Its totient is φ = 93688320.

The previous prime is 312690617. The next prime is 312690643. The reversal of 312690642 is 246096213.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (312690643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20743 + ... + 32490.

It is an arithmetic number, because the mean of its divisors is an integer number (21559770).

Almost surely, 2^312690642 is an apocalyptic number.

312690642 is an abundant number, since it is smaller than the sum of its proper divisors (377221998).

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

312690642 is a wasteful number, since it uses less digits than its factorization.

312690642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53338.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 312690642 is about 17683.0608775743. The cubic root of 312690642 is about 678.7423712976.

The spelling of 312690642 in words is "three hundred twelve million, six hundred ninety thousand, six hundred forty-two".