312020028 has 36 divisors (see below), whose sum is σ = 805502880. Its totient is φ = 101793216.

The previous prime is 312020017. The next prime is 312020029. The reversal of 312020028 is 820020213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312020029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90513 + ... + 93896.

It is an arithmetic number, because the mean of its divisors is an integer number (22375080).

Almost surely, 2^312020028 is an apocalyptic number.

It is an amenable number.

312020028 is an abundant number, since it is smaller than the sum of its proper divisors (493482852).

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

312020028 is a wasteful number, since it uses less digits than its factorization.

312020028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184466 (or 184461 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 312020028 is about 17664.0886546688. The cubic root of 312020028 is about 678.2568009382.

The spelling of 312020028 in words is "three hundred twelve million, twenty thousand, twenty-eight".