149408138 has 48 divisors (see below), whose sum is σ = 272341440. Its totient is φ = 61100160.

The previous prime is 149408131. The next prime is 149408167. The reversal of 149408138 is 831804941.

149408138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (149408131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93833 + ... + 95411.

It is an arithmetic number, because the mean of its divisors is an integer number (5673780).

Almost surely, 2^149408138 is an apocalyptic number.

149408138 is a deficient number, since it is larger than the sum of its proper divisors (122933302).

149408138 is a wasteful number, since it uses less digits than its factorization.

149408138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 149408138 is about 12223.2621668685. The cubic root of 149408138 is about 530.6295331843.

The spelling of 149408138 in words is "one hundred forty-nine million, four hundred eight thousand, one hundred thirty-eight".