149139858 has 16 divisors (see below), whose sum is σ = 340891200. Its totient is φ = 42611376.

The previous prime is 149139857. The next prime is 149139863. The reversal of 149139858 is 858931941.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149139857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775433 + ... + 1775516.

It is an arithmetic number, because the mean of its divisors is an integer number (21305700).

Almost surely, 2^149139858 is an apocalyptic number.

149139858 is an abundant number, since it is smaller than the sum of its proper divisors (191751342).

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

149139858 is a wasteful number, since it uses less digits than its factorization.

149139858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550961.

The product of its digits is 311040, while the sum is 48.

The square root of 149139858 is about 12212.2830789333. The cubic root of 149139858 is about 530.3117401809.

The spelling of 149139858 in words is "one hundred forty-nine million, one hundred thirty-nine thousand, eight hundred fifty-eight".