28540512 has 360 divisors, whose sum is σ = 113552208. Its totient is φ = 6842880.

The previous prime is 28540511. The next prime is 28540513. The reversal of 28540512 is 21504582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28540511) and next prime (28540513).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28540511) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2195418 + ... + 2195430.

Almost surely, 2^28540512 is an apocalyptic number.

28540512 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 28540512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56776104).

28540512 is an abundant number, since it is smaller than the sum of its proper divisors (85011696).

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

28540512 is a wasteful number, since it uses less digits than its factorization.

28540512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 28540512 is about 5342.3320750399. The cubic root of 28540512 is about 305.6004011215.

The spelling of 28540512 in words is "twenty-eight million, five hundred forty thousand, five hundred twelve".