28775015424 has 495 divisors, whose sum is σ = 93708165771. Its totient is φ = 8793722880.

The previous prime is 28775015411. The next prime is 28775015429. The reversal of 28775015424 is 42451057782.

The square root of 28775015424 is 169632.

It is a perfect power (a square), and thus also a powerful number.

28775015424 is a `hidden beast` number, since 2 + 8 + 77 + 501 + 54 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28775015424.

It is not an unprimeable number, because it can be changed into a prime (28775015429) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 928226289 + ... + 928226319.

Almost surely, 2^28775015424 is an apocalyptic number.

28775015424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

28775015424 is the 169632-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28775015424

28775015424 is an abundant number, since it is smaller than the sum of its proper divisors (64933150347).

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

28775015424 is an equidigital number, since it uses as much as digits as its factorization.

28775015424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 45.

The spelling of 28775015424 in words is "twenty-eight billion, seven hundred seventy-five million, fifteen thousand, four hundred twenty-four".