149803990 has 16 divisors (see below), whose sum is σ = 308168352. Its totient is φ = 51361344.

The previous prime is 149803981. The next prime is 149804003. The reversal of 149803990 is 99308941.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069959 + ... + 1070098.

It is an arithmetic number, because the mean of its divisors is an integer number (19260522).

Almost surely, 2^149803990 is an apocalyptic number.

149803990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149803990 is an abundant number, since it is smaller than the sum of its proper divisors (158364362).

149803990 is a wasteful number, since it uses less digits than its factorization.

149803990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140071.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 149803990 is about 12239.4440233207. Note that the first 3 decimals coincide. The cubic root of 149803990 is about 531.0977484810.

The spelling of 149803990 in words is "one hundred forty-nine million, eight hundred three thousand, nine hundred ninety".