149251728 has 20 divisors (see below), whose sum is σ = 385567088. Its totient is φ = 49750560.

The previous prime is 149251723. The next prime is 149251757. The reversal of 149251728 is 827152941.

It is not an unprimeable number, because it can be changed into a prime (149251723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1554658 + ... + 1554753.

Almost surely, 2^149251728 is an apocalyptic number.

It is an amenable number.

149251728 is an abundant number, since it is smaller than the sum of its proper divisors (236315360).

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

149251728 is a wasteful number, since it uses less digits than its factorization.

149251728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109422 (or 3109416 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 149251728 is about 12216.8624449979. The cubic root of 149251728 is about 530.4443028815. Note that the first 3 decimals are identical.

It can be divided in two parts, 14925 and 1728, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 149251728 in words is "one hundred forty-nine million, two hundred fifty-one thousand, seven hundred twenty-eight".