149221788 has 24 divisors (see below), whose sum is σ = 349751808. Its totient is φ = 49516656.

The previous prime is 149221783. The next prime is 149221789. The reversal of 149221788 is 887122941.

149221788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149221783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25206 + ... + 30557.

It is an arithmetic number, because the mean of its divisors is an integer number (14572992).

Almost surely, 2^149221788 is an apocalyptic number.

It is an amenable number.

149221788 is an abundant number, since it is smaller than the sum of its proper divisors (200530020).

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

149221788 is a wasteful number, since it uses less digits than its factorization.

149221788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55993 (or 55991 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 149221788 is about 12215.6370280064. The cubic root of 149221788 is about 530.4088313447.

The spelling of 149221788 in words is "one hundred forty-nine million, two hundred twenty-one thousand, seven hundred eighty-eight".