28657552 has 60 divisors (see below), whose sum is σ = 70482096. Its totient is φ = 11161920.

The previous prime is 28657543. The next prime is 28657561. The reversal of 28657552 is 25575682.

It is an interprime number because it is at equal distance from previous prime (28657543) and next prime (28657561).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6963 + ... + 10285.

Almost surely, 2^28657552 is an apocalyptic number.

28657552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28657552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35241048).

28657552 is an abundant number, since it is smaller than the sum of its proper divisors (41824544).

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

28657552 is a wasteful number, since it uses less digits than its factorization.

28657552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356 (or 3343 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 28657552 is about 5353.2748855257. The cubic root of 28657552 is about 306.0175705803.

The spelling of 28657552 in words is "twenty-eight million, six hundred fifty-seven thousand, five hundred fifty-two".