149685900 has 144 divisors (see below), whose sum is σ = 533132544. Its totient is φ = 31576320.

The previous prime is 149685853. The next prime is 149685911. The reversal of 149685900 is 9586941.

It is a super-3 number, since 3×149685900³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24559 + ... + 30041.

Almost surely, 2^149685900 is an apocalyptic number.

149685900 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 149685900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266566272).

149685900 is an abundant number, since it is smaller than the sum of its proper divisors (383446644).

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

149685900 is a wasteful number, since it uses less digits than its factorization.

149685900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 5513 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 149685900 is about 12234.6189151931. The cubic root of 149685900 is about 530.9581575833.

The spelling of 149685900 in words is "one hundred forty-nine million, six hundred eighty-five thousand, nine hundred".