149791988 has 12 divisors (see below), whose sum is σ = 262245060. Its totient is φ = 74864832.

The previous prime is 149791963. The next prime is 149792003. The reversal of 149791988 is 889197941.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 127870864 = 4682^2 + 11308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5570 + ... + 18182.

It is an arithmetic number, because the mean of its divisors is an integer number (21853755).

Almost surely, 2^149791988 is an apocalyptic number.

It is an amenable number.

149791988 is a deficient number, since it is larger than the sum of its proper divisors (112453072).

149791988 is a wasteful number, since it uses less digits than its factorization.

149791988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586 (or 15584 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 56.

The square root of 149791988 is about 12238.9537134512. The cubic root of 149791988 is about 531.0835646010.

The spelling of 149791988 in words is "one hundred forty-nine million, seven hundred ninety-one thousand, nine hundred eighty-eight".