149772228 has 48 divisors (see below), whose sum is σ = 369847296. Its totient is φ = 47074720.

The previous prime is 149772209. The next prime is 149772239. The reversal of 149772228 is 822277941.

It is a self number, because there is not a number n which added to its sum of digits gives 149772228.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15775 + ... + 23417.

It is an arithmetic number, because the mean of its divisors is an integer number (7705152).

Almost surely, 2^149772228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149772228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184923648).

149772228 is an abundant number, since it is smaller than the sum of its proper divisors (220075068).

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

149772228 is a wasteful number, since it uses less digits than its factorization.

149772228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744 (or 7742 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 149772228 is about 12238.1464282791. The cubic root of 149772228 is about 531.0602107202.

It can be divided in two parts, 14977 and 2228, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 149772228 in words is "one hundred forty-nine million, seven hundred seventy-two thousand, two hundred twenty-eight".