149403840 has 112 divisors (see below), whose sum is σ = 499384320. Its totient is φ = 37739520.

The previous prime is 149403833. The next prime is 149403857. The reversal of 149403840 is 48304941.

It is a happy 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, 14145 + ... + 22335.

Almost surely, 2^149403840 is an apocalyptic number.

149403840 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 149403840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249692160).

149403840 is an abundant number, since it is smaller than the sum of its proper divisors (349980480).

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

149403840 is a wasteful number, since it uses less digits than its factorization.

149403840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230 (or 8220 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 149403840 is about 12223.0863532906. The cubic root of 149403840 is about 530.6244449572.

The spelling of 149403840 in words is "one hundred forty-nine million, four hundred three thousand, eight hundred forty".