28757472 has 96 divisors (see below), whose sum is σ = 81430272. Its totient is φ = 8853504.

The previous prime is 28757471. The next prime is 28757527. The reversal of 28757472 is 27475782.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28757471) 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, 109213 + ... + 109475.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^28757472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28757472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40715136).

28757472 is an abundant number, since it is smaller than the sum of its proper divisors (52672800).

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

28757472 is a wasteful number, since it uses less digits than its factorization.

28757472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 352 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 28757472 is about 5362.5993697087. The cubic root of 28757472 is about 306.3728208183.

The spelling of 28757472 in words is "twenty-eight million, seven hundred fifty-seven thousand, four hundred seventy-two".