149909900 has 72 divisors (see below), whose sum is σ = 373476096. Its totient is φ = 51163200.

The previous prime is 149909891. The next prime is 149909941. The reversal of 149909900 is 9909941.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231377 + ... + 232023.

It is an arithmetic number, because the mean of its divisors is an integer number (5187168).

Almost surely, 2^149909900 is an apocalyptic number.

149909900 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 149909900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186738048).

149909900 is an abundant number, since it is smaller than the sum of its proper divisors (223566196).

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

149909900 is a wasteful number, since it uses less digits than its factorization.

149909900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 149909900 is about 12243.7698442922. The cubic root of 149909900 is about 531.2228793537. Note that the first 3 decimals are identical.

Adding to 149909900 its sum of digits (41), we get a palindrome (149909941).

The spelling of 149909900 in words is "one hundred forty-nine million, nine hundred nine thousand, nine hundred".