442008725 has 24 divisors (see below), whose sum is σ = 558767808. Its totient is φ = 346774400.

The previous prime is 442008667. The next prime is 442008731. The reversal of 442008725 is 527800244.

It is a de Polignac number, because none of the positive numbers 2^k-442008725 is a prime.

It is a super-2 number, since 2×442008725² = 390743425952251250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442008691 and 442008700.

It is a congruent number.

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, 402377 + ... + 403473.

It is an arithmetic number, because the mean of its divisors is an integer number (23281992).

Almost surely, 2^442008725 is an apocalyptic number.

It is an amenable number.

442008725 is a deficient number, since it is larger than the sum of its proper divisors (116759083).

442008725 is a wasteful number, since it uses less digits than its factorization.

442008725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 442008725 is about 21024.0035435690. The cubic root of 442008725 is about 761.7461724872.

Adding to 442008725 its reverse (527800244), we get a palindrome (969808969).

It can be divided in two parts, 44200 and 8725, that added together give a palindrome (52925).

The spelling of 442008725 in words is "four hundred forty-two million, eight thousand, seven hundred twenty-five".