628293457 has 8 divisors (see below), whose sum is σ = 686488032. Its totient is φ = 570278400.

The previous prime is 628293451. The next prime is 628293469. The reversal of 628293457 is 754392826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628293457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628293451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37503 + ... + 51604.

It is an arithmetic number, because the mean of its divisors is an integer number (85811004).

Almost surely, 2^628293457 is an apocalyptic number.

It is an amenable number.

628293457 is a deficient number, since it is larger than the sum of its proper divisors (58194575).

628293457 is a wasteful number, since it uses less digits than its factorization.

628293457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89759.

The product of its digits is 725760, while the sum is 46.

The square root of 628293457 is about 25065.7825930091. The cubic root of 628293457 is about 856.4871383819.

The spelling of 628293457 in words is "six hundred twenty-eight million, two hundred ninety-three thousand, four hundred fifty-seven".