155685628 has 48 divisors (see below), whose sum is σ = 320753664. Its totient is φ = 64733760.

The previous prime is 155685623. The next prime is 155685631. The reversal of 155685628 is 826586551.

It is a happy number.

155685628 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155685623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229626 + ... + 230302.

It is an arithmetic number, because the mean of its divisors is an integer number (6682368).

Almost surely, 2^155685628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155685628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160376832).

155685628 is an abundant number, since it is smaller than the sum of its proper divisors (165068036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155685628 is a wasteful number, since it uses less digits than its factorization.

155685628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 920 counting only the distinct ones).

The product of its digits is 576000, while the sum is 46.

The square root of 155685628 is about 12477.4046980933. The cubic root of 155685628 is about 537.9594087754.

The spelling of 155685628 in words is "one hundred fifty-five million, six hundred eighty-five thousand, six hundred twenty-eight".