628461851 has 4 divisors (see below), whose sum is σ = 628592472. Its totient is φ = 628331232.

The previous prime is 628461793. The next prime is 628461859. The reversal of 628461851 is 158164826.

628461851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628461851 - 2²² = 624267547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628461799 and 628461808.

It is not an unprimeable number, because it can be changed into a prime (628461859) 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, 57806 + ... + 67811.

It is an arithmetic number, because the mean of its divisors is an integer number (157148118).

Almost surely, 2^628461851 is an apocalyptic number.

628461851 is a deficient number, since it is larger than the sum of its proper divisors (130621).

628461851 is a wasteful number, since it uses less digits than its factorization.

628461851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130620.

The product of its digits is 92160, while the sum is 41.

The square root of 628461851 is about 25069.1414093104. The cubic root of 628461851 is about 856.5636495569.

The spelling of 628461851 in words is "six hundred twenty-eight million, four hundred sixty-one thousand, eight hundred fifty-one".