149989440 has 112 divisors (see below), whose sum is σ = 496994688. Its totient is φ = 38252544.

The previous prime is 149989429. The next prime is 149989447. The reversal of 149989440 is 44989941.

It is a happy number.

It is a super-2 number, since 2×149989440² = 44993664223027200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 149989440.

It is not an unprimeable number, because it can be changed into a prime (149989447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18684 + ... + 25476.

Almost surely, 2^149989440 is an apocalyptic number.

149989440 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 149989440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248497344).

149989440 is an abundant number, since it is smaller than the sum of its proper divisors (347005248).

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

149989440 is a wasteful number, since it uses less digits than its factorization.

149989440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836 (or 6826 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 149989440 is about 12247.0175961334. The cubic root of 149989440 is about 531.3168157715.

The spelling of 149989440 in words is "one hundred forty-nine million, nine hundred eighty-nine thousand, four hundred forty".