872644440 has 64 divisors (see below), whose sum is σ = 2632462560. Its totient is φ = 231413760.

The previous prime is 872644439. The next prime is 872644469. The reversal of 872644440 is 44446278.

872644440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 41808.

Almost surely, 2^872644440 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 872644440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316231280).

872644440 is an abundant number, since it is smaller than the sum of its proper divisors (1759818120).

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

872644440 is a wasteful number, since it uses less digits than its factorization.

872644440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40372 (or 40368 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 39.

The square root of 872644440 is about 29540.5558512361. Note that the first 3 decimals coincide. The cubic root of 872644440 is about 955.6065297207.

The spelling of 872644440 in words is "eight hundred seventy-two million, six hundred forty-four thousand, four hundred forty".