149749128 has 32 divisors (see below), whose sum is σ = 415970400. Its totient is φ = 49916304.

The previous prime is 149749123. The next prime is 149749147. The reversal of 149749128 is 821947941.

It is a happy number.

It is a super-3 number, since 3×149749128³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (149749121) 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, 346426 + ... + 346857.

It is an arithmetic number, because the mean of its divisors is an integer number (12999075).

Almost surely, 2^149749128 is an apocalyptic number.

149749128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

149749128 is an abundant number, since it is smaller than the sum of its proper divisors (266221272).

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

149749128 is a wasteful number, since it uses less digits than its factorization.

149749128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693298 (or 693288 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 149749128 is about 12237.2026215144. The cubic root of 149749128 is about 531.0329067672.

It can be divided in two parts, 1497 and 49128, that added together give a 4-th power (50625 = 15⁴).

The spelling of 149749128 in words is "one hundred forty-nine million, seven hundred forty-nine thousand, one hundred twenty-eight".