628151 has 4 divisors (see below), whose sum is σ = 630000. Its totient is φ = 626304.

The previous prime is 628139. The next prime is 628171. The reversal of 628151 is 151826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151826 = 2 ⋅75913.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628151 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 (628171) 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, 251 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2⁶²⁸¹⁵¹ is an apocalyptic number.

628151 is a deficient number, since it is larger than the sum of its proper divisors (1849).

628151 is a wasteful number, since it uses less digits than its factorization.

628151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848.

The product of its digits is 480, while the sum is 23.

The square root of 628151 is about 792.5597769254. The cubic root of 628151 is about 85.6422401217.

Adding to 628151 its reverse (151826), we get a palindrome (779977).

The spelling of 628151 in words is "six hundred twenty-eight thousand, one hundred fifty-one".