312520890 has 32 divisors (see below), whose sum is σ = 818237376. Its totient is φ = 75762560.

The previous prime is 312520801. The next prime is 312520891. The reversal of 312520890 is 98025213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (312520891) 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, 473187 + ... + 473846.

It is an arithmetic number, because the mean of its divisors is an integer number (25569918).

Almost surely, 2^312520890 is an apocalyptic number.

312520890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312520890 is an abundant number, since it is smaller than the sum of its proper divisors (505716486).

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

312520890 is a wasteful number, since it uses less digits than its factorization.

312520890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947054.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 312520890 is about 17678.2603782160. The cubic root of 312520890 is about 678.6195249275.

The spelling of 312520890 in words is "three hundred twelve million, five hundred twenty thousand, eight hundred ninety".