149561280 has 168 divisors, whose sum is σ = 561313584. Its totient is φ = 36249600.

The previous prime is 149561273. The next prime is 149561303. The reversal of 149561280 is 82165941.

149561280 is a `hidden beast` number, since 14 + 9 + 561 + 2 + 80 = 666.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29320 + ... + 34040.

Almost surely, 2^149561280 is an apocalyptic number.

149561280 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 149561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280656792).

149561280 is an abundant number, since it is smaller than the sum of its proper divisors (411752304).

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

149561280 is a wasteful number, since it uses less digits than its factorization.

149561280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755 (or 4742 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 149561280 is about 12229.5249294484. The cubic root of 149561280 is about 530.8107681127.

The spelling of 149561280 in words is "one hundred forty-nine million, five hundred sixty-one thousand, two hundred eighty".