149389138 has 16 divisors (see below), whose sum is σ = 230963040. Its totient is φ = 72426816.

The previous prime is 149389129. The next prime is 149389157. The reversal of 149389138 is 831983941.

It is a happy number.

It is a super-2 number, since 2×149389138² = 44634229104766088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706 + ... + 18202.

It is an arithmetic number, because the mean of its divisors is an integer number (14435190).

Almost surely, 2^149389138 is an apocalyptic number.

149389138 is a deficient number, since it is larger than the sum of its proper divisors (81573902).

149389138 is a wasteful number, since it uses less digits than its factorization.

149389138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681.

The product of its digits is 186624, while the sum is 46.

The square root of 149389138 is about 12222.4849355604. The cubic root of 149389138 is about 530.6070391205.

The spelling of 149389138 in words is "one hundred forty-nine million, three hundred eighty-nine thousand, one hundred thirty-eight".