155704628 has 6 divisors (see below), whose sum is σ = 272483106. Its totient is φ = 77852312.

The previous prime is 155704613. The next prime is 155704631. The reversal of 155704628 is 826407551.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 38588944 = 10822^2 + 6212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155704591 and 155704600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19463075 + ... + 19463082.

It is an arithmetic number, because the mean of its divisors is an integer number (45413851).

Almost surely, 2^155704628 is an apocalyptic number.

It is an amenable number.

155704628 is a deficient number, since it is larger than the sum of its proper divisors (116778478).

155704628 is a wasteful number, since it uses less digits than its factorization.

155704628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38926161 (or 38926159 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 155704628 is about 12478.1660511471. The cubic root of 155704628 is about 537.9812922190.

The spelling of 155704628 in words is "one hundred fifty-five million, seven hundred four thousand, six hundred twenty-eight".