628460851 has 4 divisors (see below), whose sum is σ = 629741304. Its totient is φ = 627180400.

The previous prime is 628460843. The next prime is 628460863. The reversal of 628460851 is 158064826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158064826 = 2 ⋅79032413.

It is a cyclic number.

It is not a de Polignac number, because 628460851 - 2³ = 628460843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628460821) 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, 639490 + ... + 640471.

It is an arithmetic number, because the mean of its divisors is an integer number (157435326).

Almost surely, 2^628460851 is an apocalyptic number.

628460851 is a deficient number, since it is larger than the sum of its proper divisors (1280453).

628460851 is a wasteful number, since it uses less digits than its factorization.

628460851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280452.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 628460851 is about 25069.1214644630. The cubic root of 628460851 is about 856.5631952392.

The spelling of 628460851 in words is "six hundred twenty-eight million, four hundred sixty thousand, eight hundred fifty-one".