43742820 has 96 divisors (see below), whose sum is σ = 134701056. Its totient is φ = 10518400.

The previous prime is 43742801. The next prime is 43742833. The reversal of 43742820 is 2824734.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125887 + ... + 126233.

It is an arithmetic number, because the mean of its divisors is an integer number (1403136).

Almost surely, 2^43742820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43742820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67350528).

43742820 is an abundant number, since it is smaller than the sum of its proper divisors (90958236).

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

43742820 is a wasteful number, since it uses less digits than its factorization.

43742820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 43742820 is about 6613.8354984079. The cubic root of 43742820 is about 352.3456595087.

The spelling of 43742820 in words is "forty-three million, seven hundred forty-two thousand, eight hundred twenty".