312699156 has 144 divisors (see below), whose sum is σ = 967153152. Its totient is φ = 76377600.

The previous prime is 312699151. The next prime is 312699157. The reversal of 312699156 is 651996213.

312699156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×312699156² = 195561524326224672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312699151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 266451 + ... + 267621.

Almost surely, 2^312699156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312699156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483576576).

312699156 is an abundant number, since it is smaller than the sum of its proper divisors (654453996).

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

312699156 is a wasteful number, since it uses less digits than its factorization.

312699156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1211 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 312699156 is about 17683.3016148003. The cubic root of 312699156 is about 678.7485315503.

The spelling of 312699156 in words is "three hundred twelve million, six hundred ninety-nine thousand, one hundred fifty-six".