442661724 has 36 divisors (see below), whose sum is σ = 1140067656. Its totient is φ = 144769248.

The previous prime is 442661717. The next prime is 442661729. The reversal of 442661724 is 427166244.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442661729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114094 + ... + 117909.

It is an arithmetic number, because the mean of its divisors is an integer number (31668546).

Almost surely, 2^442661724 is an apocalyptic number.

It is an amenable number.

442661724 is an abundant number, since it is smaller than the sum of its proper divisors (697405932).

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

442661724 is a wasteful number, since it uses less digits than its factorization.

442661724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232066 (or 232061 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 442661724 is about 21039.5276562949. The cubic root of 442661724 is about 762.1211083262.

The spelling of 442661724 in words is "four hundred forty-two million, six hundred sixty-one thousand, seven hundred twenty-four".