312488869 has 16 divisors (see below), whose sum is σ = 398661120. Its totient is φ = 237832560.

The previous prime is 312488867. The next prime is 312488893. The reversal of 312488869 is 968884213.

It is not a de Polignac number, because 312488869 - 2¹ = 312488867 is a prime.

It is a super-2 number, since 2×312488869² = 195298586497798322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312488867) 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, 43879 + ... + 50500.

It is an arithmetic number, because the mean of its divisors is an integer number (24916320).

Almost surely, 2^312488869 is an apocalyptic number.

It is an amenable number.

312488869 is a deficient number, since it is larger than the sum of its proper divisors (86172251).

312488869 is a wasteful number, since it uses less digits than its factorization.

312488869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94440.

The product of its digits is 663552, while the sum is 49.

The square root of 312488869 is about 17677.3546946369. The cubic root of 312488869 is about 678.5963469377.

The spelling of 312488869 in words is "three hundred twelve million, four hundred eighty-eight thousand, eight hundred sixty-nine".