155168728 has 32 divisors (see below), whose sum is σ = 341807760. Its totient is φ = 65105280.

The previous prime is 155168711. The next prime is 155168729. The reversal of 155168728 is 827861551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155168729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66675 + ... + 68962.

Almost surely, 2^155168728 is an apocalyptic number.

It is an amenable number.

155168728 is an abundant number, since it is smaller than the sum of its proper divisors (186639032).

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

155168728 is a wasteful number, since it uses less digits than its factorization.

155168728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135667 (or 135663 counting only the distinct ones).

The product of its digits is 134400, while the sum is 43.

The square root of 155168728 is about 12456.6740344283. The cubic root of 155168728 is about 537.3633795912.

The spelling of 155168728 in words is "one hundred fifty-five million, one hundred sixty-eight thousand, seven hundred twenty-eight".