28038372 has 24 divisors (see below), whose sum is σ = 69271776. Its totient is φ = 8796288.

The previous prime is 28038371. The next prime is 28038377. The reversal of 28038372 is 27383082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28038371) 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, 68518 + ... + 68925.

It is an arithmetic number, because the mean of its divisors is an integer number (2886324).

Almost surely, 2^28038372 is an apocalyptic number.

It is an amenable number.

28038372 is an abundant number, since it is smaller than the sum of its proper divisors (41233404).

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

28038372 is a wasteful number, since it uses less digits than its factorization.

28038372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137467 (or 137465 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28038372 is about 5295.1271939397. The cubic root of 28038372 is about 303.7975481460.

It can be divided in two parts, 2803 and 8372, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 28038372 in words is "twenty-eight million, thirty-eight thousand, three hundred seventy-two".