628978124 has 12 divisors (see below), whose sum is σ = 1103459448. Its totient is φ = 313704000.

The previous prime is 628978123. The next prime is 628978159. The reversal of 628978124 is 421879826.

It is a happy number.

It is a super-2 number, since 2×628978124² = 791226960941118752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628978123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194462 + ... + 197669.

It is an arithmetic number, because the mean of its divisors is an integer number (91954954).

Almost surely, 2^628978124 is an apocalyptic number.

It is an amenable number.

628978124 is a deficient number, since it is larger than the sum of its proper divisors (474481324).

628978124 is a wasteful number, since it uses less digits than its factorization.

628978124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392536 (or 392534 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 628978124 is about 25079.4362775562. The cubic root of 628978124 is about 856.7981372174.

The spelling of 628978124 in words is "six hundred twenty-eight million, nine hundred seventy-eight thousand, one hundred twenty-four".