28389372 has 48 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 8565760.

The previous prime is 28389353. The next prime is 28389373. The reversal of 28389372 is 27398382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28389373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59029 + ... + 59507.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^28389372 is an apocalyptic number.

28389372 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28389372 is an abundant number, since it is smaller than the sum of its proper divisors (44186628).

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

28389372 is a wasteful number, since it uses less digits than its factorization.

28389372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 944 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 28389372 is about 5328.1677901508. The cubic root of 28389372 is about 305.0599971552.

The spelling of 28389372 in words is "twenty-eight million, three hundred eighty-nine thousand, three hundred seventy-two".