872505428 has 12 divisors (see below), whose sum is σ = 1535415840. Its totient is φ = 433815192.

The previous prime is 872505421. The next prime is 872505449. The reversal of 872505428 is 824505278.

It is a super-2 number, since 2×872505428² = 1522531443778926368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872505421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608576 + ... + 610007.

It is an arithmetic number, because the mean of its divisors is an integer number (127951320).

Almost surely, 2^872505428 is an apocalyptic number.

It is an amenable number.

872505428 is a deficient number, since it is larger than the sum of its proper divisors (662910412).

872505428 is a wasteful number, since it uses less digits than its factorization.

872505428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218766 (or 1218764 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 872505428 is about 29538.2028566397. The cubic root of 872505428 is about 955.5557844139. Note that the first 3 decimals are identical.

The spelling of 872505428 in words is "eight hundred seventy-two million, five hundred five thousand, four hundred twenty-eight".