628724492 has 12 divisors (see below), whose sum is σ = 1200292296. Its totient is φ = 285783840.

The previous prime is 628724491. The next prime is 628724501. The reversal of 628724492 is 294427826.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 14289193 = 628724492 / (6 + 2 + 8 + 7 + 2 + 4 + 4 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (628724491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144553 + ... + 7144640.

It is an arithmetic number, because the mean of its divisors is an integer number (100024358).

Almost surely, 2^628724492 is an apocalyptic number.

It is an amenable number.

628724492 is a deficient number, since it is larger than the sum of its proper divisors (571567804).

628724492 is a wasteful number, since it uses less digits than its factorization.

628724492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14289208 (or 14289206 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 628724492 is about 25074.3791947079. The cubic root of 628724492 is about 856.6829553411.

The spelling of 628724492 in words is "six hundred twenty-eight million, seven hundred twenty-four thousand, four hundred ninety-two".