42647724 has 72 divisors (see below), whose sum is σ = 124750080. Its totient is φ = 12032352.

The previous prime is 42647707. The next prime is 42647797. The reversal of 42647724 is 42774624.

It is a happy number.

42647724 is a `hidden beast` number, since 4 + 2 + 647 + 7 + 2 + 4 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19897 + ... + 21935.

It is an arithmetic number, because the mean of its divisors is an integer number (1732640).

Almost surely, 2^42647724 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 42647724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62375040).

42647724 is an abundant number, since it is smaller than the sum of its proper divisors (82102356).

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

42647724 is a wasteful number, since it uses less digits than its factorization.

42647724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2134 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 42647724 is about 6530.5224905822. The cubic root of 42647724 is about 349.3804659162.

The spelling of 42647724 in words is "forty-two million, six hundred forty-seven thousand, seven hundred twenty-four".