628164157 has 8 divisors (see below), whose sum is σ = 665675640. Its totient is φ = 591709440.

The previous prime is 628164137. The next prime is 628164181. The reversal of 628164157 is 751461826.

It can be written as a sum of positive squares in 4 ways, for example, as 9696996 + 618467161 = 3114^2 + 24869^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 628164157 - 2⁷ = 628164029 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 (628164137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262968 + ... + 265345.

It is an arithmetic number, because the mean of its divisors is an integer number (83209455).

Almost surely, 2^628164157 is an apocalyptic number.

It is an amenable number.

628164157 is a deficient number, since it is larger than the sum of its proper divisors (37511483).

628164157 is a wasteful number, since it uses less digits than its factorization.

628164157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528383.

The product of its digits is 80640, while the sum is 40.

The square root of 628164157 is about 25063.2032469914. The cubic root of 628164157 is about 856.4283806027.

The spelling of 628164157 in words is "six hundred twenty-eight million, one hundred sixty-four thousand, one hundred fifty-seven".