312644380 has 12 divisors (see below), whose sum is σ = 656553240. Its totient is φ = 125057744.

The previous prime is 312644351. The next prime is 312644401. The reversal of 312644380 is 83446213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7816090 + ... + 7816129.

It is an arithmetic number, because the mean of its divisors is an integer number (54712770).

Almost surely, 2^312644380 is an apocalyptic number.

It is an amenable number.

312644380 is an abundant number, since it is smaller than the sum of its proper divisors (343908860).

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

312644380 is a wasteful number, since it uses less digits than its factorization.

312644380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15632228 (or 15632226 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 312644380 is about 17681.7527411736. The cubic root of 312644380 is about 678.7088967554.

The spelling of 312644380 in words is "three hundred twelve million, six hundred forty-four thousand, three hundred eighty".