872448581 has 16 divisors (see below), whose sum is σ = 921279744. Its totient is φ = 824592384.

The previous prime is 872448569. The next prime is 872448613. The reversal of 872448581 is 185844278.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872448581 is a prime.

It is a super-2 number, since 2×872448581² = 1522333052977827122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872442581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756101 + ... + 757253.

It is an arithmetic number, because the mean of its divisors is an integer number (57579984).

Almost surely, 2^872448581 is an apocalyptic number.

It is an amenable number.

872448581 is a deficient number, since it is larger than the sum of its proper divisors (48831163).

872448581 is a wasteful number, since it uses less digits than its factorization.

872448581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540.

The product of its digits is 573440, while the sum is 47.

The square root of 872448581 is about 29537.2405786323. The cubic root of 872448581 is about 955.5350312825.

The spelling of 872448581 in words is "eight hundred seventy-two million, four hundred forty-eight thousand, five hundred eighty-one".