149664840 has 128 divisors (see below), whose sum is σ = 486984960. Its totient is φ = 36578304.

The previous prime is 149664839. The next prime is 149664847. The reversal of 149664840 is 48466941.

149664840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 149664792 and 149664801.

It is not an unprimeable number, because it can be changed into a prime (149664847) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 307077 + ... + 307563.

It is an arithmetic number, because the mean of its divisors is an integer number (3804570).

Almost surely, 2^149664840 is an apocalyptic number.

149664840 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 149664840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243492480).

149664840 is an abundant number, since it is smaller than the sum of its proper divisors (337320120).

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

149664840 is a wasteful number, since it uses less digits than its factorization.

149664840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 149664840 is about 12233.7582124219. The cubic root of 149664840 is about 530.9332554310.

The spelling of 149664840 in words is "one hundred forty-nine million, six hundred sixty-four thousand, eight hundred forty".