149388440 has 16 divisors (see below), whose sum is σ = 336124080. Its totient is φ = 59755360.

The previous prime is 149388409. The next prime is 149388487. The reversal of 149388440 is 44883941.

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, 1867316 + ... + 1867395.

It is an arithmetic number, because the mean of its divisors is an integer number (21007755).

Almost surely, 2^149388440 is an apocalyptic number.

149388440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149388440 is an abundant number, since it is smaller than the sum of its proper divisors (186735640).

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

149388440 is a wasteful number, since it uses less digits than its factorization.

149388440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734722 (or 3734718 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 149388440 is about 12222.4563815953. The cubic root of 149388440 is about 530.6062127234.

The spelling of 149388440 in words is "one hundred forty-nine million, three hundred eighty-eight thousand, four hundred forty".