43749720 has 192 divisors, whose sum is σ = 168779520. Its totient is φ = 9984384.

The previous prime is 43749709. The next prime is 43749743. The reversal of 43749720 is 2794734.

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 47 ways as a sum of consecutive naturals, for example, 67719 + ... + 68361.

It is an arithmetic number, because the mean of its divisors is an integer number (879060).

Almost surely, 2^43749720 is an apocalyptic number.

43749720 is a gapful number since it is divisible by the number (40) 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 43749720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84389760).

43749720 is an abundant number, since it is smaller than the sum of its proper divisors (125029800).

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

43749720 is a wasteful number, since it uses less digits than its factorization.

43749720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 43749720 is about 6614.3571116171. The cubic root of 43749720 is about 352.3641848898.

The spelling of 43749720 in words is "forty-three million, seven hundred forty-nine thousand, seven hundred twenty".