149309440 has 96 divisors (see below), whose sum is σ = 409631040. Its totient is φ = 51167232.

The previous prime is 149309437. The next prime is 149309497. The reversal of 149309440 is 44903941.

It is a super-2 number, since 2×149309440² = 44586617746227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 149309396 and 149309405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70639 + ... + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (4266990).

Almost surely, 2^149309440 is an apocalyptic number.

149309440 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 149309440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204815520).

149309440 is an abundant number, since it is smaller than the sum of its proper divisors (260321600).

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

149309440 is an equidigital number, since it uses as much as digits as its factorization.

149309440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 149309440 is about 12219.2241979595. The cubic root of 149309440 is about 530.5126640257.

The spelling of 149309440 in words is "one hundred forty-nine million, three hundred nine thousand, four hundred forty".