28841772 has 24 divisors (see below), whose sum is σ = 70840000. Its totient is φ = 9107856.

The previous prime is 28841767. The next prime is 28841773. The reversal of 28841772 is 27714882.

It is a self number, because there is not a number n which added to its sum of digits gives 28841772.

It is not an unprimeable number, because it can be changed into a prime (28841773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63022 + ... + 63477.

Almost surely, 2^28841772 is an apocalyptic number.

It is an amenable number.

28841772 is an abundant number, since it is smaller than the sum of its proper divisors (41998228).

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

28841772 is a wasteful number, since it uses less digits than its factorization.

28841772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126525 (or 126523 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 28841772 is about 5370.4536121263. The cubic root of 28841772 is about 306.6718970963.

It can be divided in two parts, 2884 and 1772, that added together give a triangular number (4656 = T₉₆).

The spelling of 28841772 in words is "twenty-eight million, eight hundred forty-one thousand, seven hundred seventy-two".