174428639 has 12 divisors (see below), whose sum is σ = 219118032. Its totient is φ = 135917760.

The previous prime is 174428633. The next prime is 174428641. The reversal of 174428639 is 936824471.

It is not a de Polignac number, because 174428639 - 2⁴ = 174428623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 174428639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (174428633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102122 + ... + 103815.

It is an arithmetic number, because the mean of its divisors is an integer number (18259836).

Almost surely, 2^174428639 is an apocalyptic number.

174428639 is a deficient number, since it is larger than the sum of its proper divisors (44689393).

174428639 is a wasteful number, since it uses less digits than its factorization.

174428639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205966 (or 205955 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 174428639 is about 13207.1434837364. The cubic root of 174428639 is about 558.7350690257.

The spelling of 174428639 in words is "one hundred seventy-four million, four hundred twenty-eight thousand, six hundred thirty-nine".