149291870 has 32 divisors (see below), whose sum is σ = 330740928. Its totient is φ = 47248128.

The previous prime is 149291803. The next prime is 149291887. The reversal of 149291870 is 78192941.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 81119 + ... + 82938.

It is an arithmetic number, because the mean of its divisors is an integer number (10335654).

Almost surely, 2^149291870 is an apocalyptic number.

149291870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149291870 is an abundant number, since it is smaller than the sum of its proper divisors (181449058).

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

149291870 is a wasteful number, since it uses less digits than its factorization.

149291870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164084.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 149291870 is about 12218.5052277273. The cubic root of 149291870 is about 530.4918538364.

The spelling of 149291870 in words is "one hundred forty-nine million, two hundred ninety-one thousand, eight hundred seventy".