628457285 has 8 divisors (see below), whose sum is σ = 755031840. Its totient is φ = 502177104.

The previous prime is 628457261. The next prime is 628457299. The reversal of 628457285 is 582754826.

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

It is a cyclic number.

It is not a de Polignac number, because 628457285 - 2⁸ = 628457029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68867 + ... + 77456.

It is an arithmetic number, because the mean of its divisors is an integer number (94378980).

Almost surely, 2^628457285 is an apocalyptic number.

It is an amenable number.

628457285 is a deficient number, since it is larger than the sum of its proper divisors (126574555).

628457285 is a wasteful number, since it uses less digits than its factorization.

628457285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147187.

The product of its digits is 1075200, while the sum is 47.

The square root of 628457285 is about 25069.0503410081. The cubic root of 628457285 is about 856.5615751382.

The spelling of 628457285 in words is "six hundred twenty-eight million, four hundred fifty-seven thousand, two hundred eighty-five".