872228385 has 32 divisors (see below), whose sum is σ = 1772148480. Its totient is φ = 398732544.

The previous prime is 872228381. The next prime is 872228407. The reversal of 872228385 is 583822278.

It is not a de Polignac number, because 872228385 - 2² = 872228381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 872228385.

It is not an unprimeable number, because it can be changed into a prime (872228381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460552 + ... + 462441.

It is an arithmetic number, because the mean of its divisors is an integer number (55379640).

Almost surely, 2^872228385 is an apocalyptic number.

It is an amenable number.

872228385 is an abundant number, since it is smaller than the sum of its proper divisors (899920095).

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

872228385 is a wasteful number, since it uses less digits than its factorization.

872228385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923014 (or 923008 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 872228385 is about 29533.5129132990. The cubic root of 872228385 is about 955.4546358300.

The spelling of 872228385 in words is "eight hundred seventy-two million, two hundred twenty-eight thousand, three hundred eighty-five".