149739520 has 96 divisors (see below), whose sum is σ = 410810400. Its totient is φ = 51314688.

The previous prime is 149739449. The next prime is 149739521. The reversal of 149739520 is 25937941.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149739521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70636 + ... + 72724.

It is an arithmetic number, because the mean of its divisors is an integer number (4279275).

Almost surely, 2^149739520 is an apocalyptic number.

149739520 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 149739520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205405200).

149739520 is an abundant number, since it is smaller than the sum of its proper divisors (261070880).

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

149739520 is an equidigital number, since it uses as much as digits as its factorization.

149739520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 149739520 is about 12236.8100418369. The cubic root of 149739520 is about 531.0215493871.

The spelling of 149739520 in words is "one hundred forty-nine million, seven hundred thirty-nine thousand, five hundred twenty".