28715020425 has 360 divisors, whose sum is σ = 67564722456. Its totient is φ = 11948912640.

The previous prime is 28715020363. The next prime is 28715020457. The reversal of 28715020425 is 52402051782.

It is a happy number.

28715020425 is a `hidden beast` number, since 2 + 87 + 150 + 2 + 0 + 425 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 12902460921 + 15812559504 = 113589^2 + 125748^2 .

It is not a de Polignac number, because 28715020425 - 2¹² = 28715016329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28715020425.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 145761427 + ... + 145761623.

Almost surely, 2^28715020425 is an apocalyptic number.

28715020425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28715020425 is an abundant number, since it is smaller than the sum of its proper divisors (38849702031).

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

28715020425 is a wasteful number, since it uses less digits than its factorization.

28715020425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 28715020425 in words is "twenty-eight billion, seven hundred fifteen million, twenty thousand, four hundred twenty-five".