149207220 has 144 divisors (see below), whose sum is σ = 467970048. Its totient is φ = 38465280.

The previous prime is 149207207. The next prime is 149207231. The reversal of 149207220 is 22702941.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 1174797 + ... + 1174923.

It is an arithmetic number, because the mean of its divisors is an integer number (3249792).

Almost surely, 2^149207220 is an apocalyptic number.

149207220 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 149207220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233985024).

149207220 is an abundant number, since it is smaller than the sum of its proper divisors (318762828).

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

149207220 is a wasteful number, since it uses less digits than its factorization.

149207220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 149207220 is about 12215.0407285445. The cubic root of 149207220 is about 530.3915701314.

The spelling of 149207220 in words is "one hundred forty-nine million, two hundred seven thousand, two hundred twenty".