628891301 has 4 divisors (see below), whose sum is σ = 629019552. Its totient is φ = 628763052.

The previous prime is 628891283. The next prime is 628891309. The reversal of 628891301 is 103198826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628891301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628891309) 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, 56465 + ... + 66678.

It is an arithmetic number, because the mean of its divisors is an integer number (157254888).

Almost surely, 2^628891301 is an apocalyptic number.

It is an amenable number.

628891301 is a deficient number, since it is larger than the sum of its proper divisors (128251).

628891301 is a wasteful number, since it uses less digits than its factorization.

628891301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128250.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 628891301 is about 25077.7052578580. The cubic root of 628891301 is about 856.7587117828.

The spelling of 628891301 in words is "six hundred twenty-eight million, eight hundred ninety-one thousand, three hundred one".