149440140 has 144 divisors (see below), whose sum is σ = 476435232. Its totient is φ = 39315456.

The previous prime is 149440069. The next prime is 149440141. The reversal of 149440140 is 41044941.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (149440141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 471262 + ... + 471578.

It is an arithmetic number, because the mean of its divisors is an integer number (3308578).

Almost surely, 2^149440140 is an apocalyptic number.

149440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149440140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238217616).

149440140 is an abundant number, since it is smaller than the sum of its proper divisors (326995092).

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

149440140 is a wasteful number, since it uses less digits than its factorization.

149440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 149440140 is about 12224.5711581225. The cubic root of 149440140 is about 530.6674159803.

The spelling of 149440140 in words is "one hundred forty-nine million, four hundred forty thousand, one hundred forty".