28923772 has 6 divisors (see below), whose sum is σ = 50616608. Its totient is φ = 14461884.

The previous prime is 28923709. The next prime is 28923779. The reversal of 28923772 is 27732982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28923779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3615468 + ... + 3615475.

Almost surely, 2^28923772 is an apocalyptic number.

It is an amenable number.

28923772 is a deficient number, since it is larger than the sum of its proper divisors (21692836).

28923772 is a wasteful number, since it uses less digits than its factorization.

28923772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230947 (or 7230945 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 28923772 is about 5378.0825579383. The cubic root of 28923772 is about 306.9622549060.

The spelling of 28923772 in words is "twenty-eight million, nine hundred twenty-three thousand, seven hundred seventy-two".