149640440 has 16 divisors (see below), whose sum is σ = 336691080. Its totient is φ = 59856160.

The previous prime is 149640431. The next prime is 149640467. The reversal of 149640440 is 44046941.

It is a super-2 number, since 2×149640440² = 44784522566787200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 149640397 and 149640406.

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, 1870466 + ... + 1870545.

Almost surely, 2^149640440 is an apocalyptic number.

149640440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149640440 is an abundant number, since it is smaller than the sum of its proper divisors (187050640).

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

149640440 is a wasteful number, since it uses less digits than its factorization.

149640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741022 (or 3741018 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 149640440 is about 12232.7609312044. The cubic root of 149640440 is about 530.9044010131.

The spelling of 149640440 in words is "one hundred forty-nine million, six hundred forty thousand, four hundred forty".