149028220 has 48 divisors (see below), whose sum is σ = 344082816. Its totient is φ = 53768000.

The previous prime is 149028203. The next prime is 149028233. The reversal of 149028220 is 22820941.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 26235 + ... + 31405.

It is an arithmetic number, because the mean of its divisors is an integer number (7168392).

Almost surely, 2^149028220 is an apocalyptic number.

149028220 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 149028220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172041408).

149028220 is an abundant number, since it is smaller than the sum of its proper divisors (195054596).

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

149028220 is a wasteful number, since it uses less digits than its factorization.

149028220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322 (or 5320 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 149028220 is about 12207.7114972463. The cubic root of 149028220 is about 530.1793862928.

The spelling of 149028220 in words is "one hundred forty-nine million, twenty-eight thousand, two hundred twenty".