442166652 has 36 divisors (see below), whose sum is σ = 1119756456. Its totient is φ = 147117600.

The previous prime is 442166639. The next prime is 442166653. The reversal of 442166652 is 256661244.

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

It is a super-2 number, since 2×442166652² = 391022696281778208, which contains 22 as substring.

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 (442166653) 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, 9027 + ... + 31077.

It is an arithmetic number, because the mean of its divisors is an integer number (31104346).

Almost surely, 2^442166652 is an apocalyptic number.

It is an amenable number.

442166652 is an abundant number, since it is smaller than the sum of its proper divisors (677589804).

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

442166652 is a wasteful number, since it uses less digits than its factorization.

442166652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618 (or 22613 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 442166652 is about 21027.7590817472. The cubic root of 442166652 is about 761.8368840926.

The spelling of 442166652 in words is "four hundred forty-two million, one hundred sixty-six thousand, six hundred fifty-two".