628514731 has 4 divisors (see below), whose sum is σ = 676862032. Its totient is φ = 580167432.

The previous prime is 628514713. The next prime is 628514741. The reversal of 628514731 is 137415826.

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

It is not a de Polignac number, because 628514731 - 2⁹ = 628514219 is a prime.

It is a super-2 number, since 2×628514731² = 790061534168004722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628514741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24173631 + ... + 24173656.

It is an arithmetic number, because the mean of its divisors is an integer number (169215508).

Almost surely, 2^628514731 is an apocalyptic number.

628514731 is a deficient number, since it is larger than the sum of its proper divisors (48347301).

628514731 is a wasteful number, since it uses less digits than its factorization.

628514731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48347300.

The product of its digits is 40320, while the sum is 37.

The square root of 628514731 is about 25070.1960702345. The cubic root of 628514731 is about 856.5876731925.

The spelling of 628514731 in words is "six hundred twenty-eight million, five hundred fourteen thousand, seven hundred thirty-one".