28444692 has 12 divisors (see below), whose sum is σ = 66370976. Its totient is φ = 9481560.

The previous prime is 28444657. The next prime is 28444697. The reversal of 28444692 is 29644482.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28444692.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444697) 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, 1185184 + ... + 1185207.

Almost surely, 2^28444692 is an apocalyptic number.

It is an amenable number.

28444692 is an abundant number, since it is smaller than the sum of its proper divisors (37926284).

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

28444692 is a wasteful number, since it uses less digits than its factorization.

28444692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370398 (or 2370396 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 28444692 is about 5333.3565416162. The cubic root of 28444692 is about 305.2580169086.

Subtracting from 28444692 its sum of digits (39), we obtain a triangular number (28444653 = T₇₅₄₂).

The spelling of 28444692 in words is "twenty-eight million, four hundred forty-four thousand, six hundred ninety-two".