628154 has 4 divisors (see below), whose sum is σ = 942234. Its totient is φ = 314076.

The previous prime is 628139. The next prime is 628171. The reversal of 628154 is 451826.

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

It can be written as a sum of positive squares in only one way, i.e., 597529 + 30625 = 773^2 + 175^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157037 + ... + 157040.

2⁶²⁸¹⁵⁴ is an apocalyptic number.

628154 is a deficient number, since it is larger than the sum of its proper divisors (314080).

628154 is a wasteful number, since it uses less digits than its factorization.

628154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314079.

The product of its digits is 1920, while the sum is 26.

The square root of 628154 is about 792.5616695248. The cubic root of 628154 is about 85.6423764617.

The spelling of 628154 in words is "six hundred twenty-eight thousand, one hundred fifty-four".