149569728 has 224 divisors, whose sum is σ = 504066048. Its totient is φ = 38016000.

The previous prime is 149569727. The next prime is 149569753. The reversal of 149569728 is 827965941.

149569728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×149569728² = 44742207067987968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149569727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990453 + ... + 990603.

Almost surely, 2^149569728 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 149569728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252033024).

149569728 is an abundant number, since it is smaller than the sum of its proper divisors (354496320).

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

149569728 is a wasteful number, since it uses less digits than its factorization.

149569728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 241 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 149569728 is about 12229.8703182004. The cubic root of 149569728 is about 530.8207622434.

The spelling of 149569728 in words is "one hundred forty-nine million, five hundred sixty-nine thousand, seven hundred twenty-eight".