28822772 has 48 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 11864160.

The previous prime is 28822763. The next prime is 28822789. The reversal of 28822772 is 27722882.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 18479 + ... + 19977.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^28822772 is an apocalyptic number.

28822772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28822772 is an abundant number, since it is smaller than the sum of its proper divisors (31657228).

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

28822772 is a wasteful number, since it uses less digits than its factorization.

28822772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1554 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 28822772 is about 5368.6843826025. The cubic root of 28822772 is about 306.6045405551.

The spelling of 28822772 in words is "twenty-eight million, eight hundred twenty-two thousand, seven hundred seventy-two".