628143912 has 72 divisors (see below), whose sum is σ = 1869965370. Its totient is φ = 190344000.

The previous prime is 628143899. The next prime is 628143949. The reversal of 628143912 is 219341826.

628143912 is a `hidden beast` number, since 628 + 14 + 3 + 9 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 599564196 + 28579716 = 24486^2 + 5346^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27339 + ... + 44762.

Almost surely, 2^628143912 is an apocalyptic number.

It is an amenable number.

628143912 is an abundant number, since it is smaller than the sum of its proper divisors (1241821458).

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

628143912 is a wasteful number, since it uses less digits than its factorization.

628143912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72135 (or 72117 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 628143912 is about 25062.7993647956. The cubic root of 628143912 is about 856.4191799404.

The spelling of 628143912 in words is "six hundred twenty-eight million, one hundred forty-three thousand, nine hundred twelve".