628136 has 8 divisors (see below), whose sum is σ = 1177770. Its totient is φ = 314064.

The previous prime is 628127. The next prime is 628139. The reversal of 628136 is 631826.

It can be written as a sum of positive squares in only one way, i.e., 372100 + 256036 = 610^2 + 506^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (628139) by changing a digit.

628136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39251 + ... + 39266.

2⁶²⁸¹³⁶ is an apocalyptic number.

It is an amenable number.

628136 is a deficient number, since it is larger than the sum of its proper divisors (549634).

628136 is a wasteful number, since it uses less digits than its factorization.

628136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78523 (or 78519 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 628136 is about 792.5503138603. The cubic root of 628136 is about 85.6415584152.

The spelling of 628136 in words is "six hundred twenty-eight thousand, one hundred thirty-six".