149215840 has 48 divisors (see below), whose sum is σ = 353454192. Its totient is φ = 59528704.

The previous prime is 149215819. The next prime is 149215841. The reversal of 149215840 is 48512941.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 149215796 and 149215805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149215841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73722 + ... + 75718.

It is an arithmetic number, because the mean of its divisors is an integer number (7363629).

Almost surely, 2^149215840 is an apocalyptic number.

149215840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149215840 is an abundant number, since it is smaller than the sum of its proper divisors (204238352).

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

149215840 is a wasteful number, since it uses less digits than its factorization.

149215840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 149215840 is about 12215.3935671349. The cubic root of 149215840 is about 530.4017838626.

The spelling of 149215840 in words is "one hundred forty-nine million, two hundred fifteen thousand, eight hundred forty".