149889940 has 12 divisors (see below), whose sum is σ = 314768916. Its totient is φ = 59955968.

The previous prime is 149889937. The next prime is 149889953. The reversal of 149889940 is 49988941.

It is a happy number.

149889940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 62504836 + 87385104 = 7906^2 + 9348^2 .

It is a super-2 number, since 2×149889940² = 44933988226407200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3747229 + ... + 3747268.

It is an arithmetic number, because the mean of its divisors is an integer number (26230743).

Almost surely, 2^149889940 is an apocalyptic number.

149889940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149889940 is an abundant number, since it is smaller than the sum of its proper divisors (164878976).

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

149889940 is a wasteful number, since it uses less digits than its factorization.

149889940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7494506 (or 7494504 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 149889940 is about 12242.9547087294. The cubic root of 149889940 is about 531.1993014594.

Subtracting from 149889940 its reverse (49988941), we obtain a palindrome (99900999).

The spelling of 149889940 in words is "one hundred forty-nine million, eight hundred eighty-nine thousand, nine hundred forty".