149505890 has 16 divisors (see below), whose sum is σ = 270321408. Its totient is φ = 59533296.

The previous prime is 149505869. The next prime is 149505943. The reversal of 149505890 is 98505941.

It is a happy number.

149505890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×149505890³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31292 + ... + 35751.

It is an arithmetic number, because the mean of its divisors is an integer number (16895088).

Almost surely, 2^149505890 is an apocalyptic number.

149505890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149505890 is a deficient number, since it is larger than the sum of its proper divisors (120815518).

149505890 is a wasteful number, since it uses less digits than its factorization.

149505890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67273.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 149505890 is about 12227.2601182767. The cubic root of 149505890 is about 530.7452314560.

The spelling of 149505890 in words is "one hundred forty-nine million, five hundred five thousand, eight hundred ninety".