149765220 has 192 divisors, whose sum is σ = 535449600. Its totient is φ = 34369920.

The previous prime is 149765219. The next prime is 149765243. The reversal of 149765220 is 22567941.

149765220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×149765220² = 44859242243296800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112197 + ... + 113523.

It is an arithmetic number, because the mean of its divisors is an integer number (2788800).

Almost surely, 2^149765220 is an apocalyptic number.

149765220 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 149765220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267724800).

149765220 is an abundant number, since it is smaller than the sum of its proper divisors (385684380).

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

149765220 is a wasteful number, since it uses less digits than its factorization.

149765220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 149765220 is about 12237.8601070612. The cubic root of 149765220 is about 531.0519276358.

The spelling of 149765220 in words is "one hundred forty-nine million, seven hundred sixty-five thousand, two hundred twenty".