149666728 has 32 divisors (see below), whose sum is σ = 289172520. Its totient is φ = 72576000.

The previous prime is 149666723. The next prime is 149666747. The reversal of 149666728 is 827666941.

It can be written as a sum of positive squares in 4 ways, for example, as 4656964 + 145009764 = 2158^2 + 12042^2 .

It is not an unprimeable number, because it can be changed into a prime (149666723) 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, 58108 + ... + 60628.

Almost surely, 2^149666728 is an apocalyptic number.

It is an amenable number.

149666728 is a deficient number, since it is larger than the sum of its proper divisors (139505792).

149666728 is a wasteful number, since it uses less digits than its factorization.

149666728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2745 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 149666728 is about 12233.8353757111. The cubic root of 149666728 is about 530.9354879700.

The spelling of 149666728 in words is "one hundred forty-nine million, six hundred sixty-six thousand, seven hundred twenty-eight".