628877738 has 8 divisors (see below), whose sum is σ = 953915940. Its totient is φ = 310905760.

The previous prime is 628877737. The next prime is 628877761. The reversal of 628877738 is 837778826.

It can be written as a sum of positive squares in 2 ways, for example, as 497156209 + 131721529 = 22297^2 + 11477^2 .

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

It is not an unprimeable number, because it can be changed into a prime (628877737) 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, 1766333 + ... + 1766688.

Almost surely, 2^628877738 is an apocalyptic number.

628877738 is a deficient number, since it is larger than the sum of its proper divisors (325038202).

628877738 is a wasteful number, since it uses less digits than its factorization.

628877738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533112.

The product of its digits is 6322176, while the sum is 56.

The square root of 628877738 is about 25077.4348369206. The cubic root of 628877738 is about 856.7525526357.

The spelling of 628877738 in words is "six hundred twenty-eight million, eight hundred seventy-seven thousand, seven hundred thirty-eight".