155391628 has 48 divisors (see below), whose sum is σ = 340441920. Its totient is φ = 60512256.

The previous prime is 155391617. The next prime is 155391629. The reversal of 155391628 is 826193551.

It is not an unprimeable number, because it can be changed into a prime (155391629) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 19432.

It is an arithmetic number, because the mean of its divisors is an integer number (7092540).

Almost surely, 2^155391628 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 155391628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170220960).

155391628 is an abundant number, since it is smaller than the sum of its proper divisors (185050292).

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

155391628 is a wasteful number, since it uses less digits than its factorization.

155391628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314 (or 11312 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 155391628 is about 12465.6178346683. The cubic root of 155391628 is about 537.6205641212.

The spelling of 155391628 in words is "one hundred fifty-five million, three hundred ninety-one thousand, six hundred twenty-eight".