28351772 has 12 divisors (see below), whose sum is σ = 50071560. Its totient is φ = 14045616.

The previous prime is 28351769. The next prime is 28351777. The reversal of 28351772 is 27715382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351777) 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, 32078 + ... + 32949.

It is an arithmetic number, because the mean of its divisors is an integer number (4172630).

Almost surely, 2^28351772 is an apocalyptic number.

It is an amenable number.

28351772 is a deficient number, since it is larger than the sum of its proper divisors (21719788).

28351772 is a wasteful number, since it uses less digits than its factorization.

28351772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65140 (or 65138 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 28351772 is about 5324.6382036717. The cubic root of 28351772 is about 304.9252598375.

The spelling of 28351772 in words is "twenty-eight million, three hundred fifty-one thousand, seven hundred seventy-two".