28012998525 has 24 divisors (see below), whose sum is σ = 46967154624. Its totient is φ = 14729836800.

The previous prime is 28012998523. The next prime is 28012998527. The reversal of 28012998525 is 52589921082.

It is an interprime number because it is at equal distance from previous prime (28012998523) and next prime (28012998527).

It is not a de Polignac number, because 28012998525 - 2¹ = 28012998523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28012998523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2625004 + ... + 2635653.

It is an arithmetic number, because the mean of its divisors is an integer number (1956964776).

Almost surely, 2^28012998525 is an apocalyptic number.

28012998525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28012998525 is a deficient number, since it is larger than the sum of its proper divisors (18954156099).

28012998525 is a wasteful number, since it uses less digits than its factorization.

28012998525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260741 (or 5260736 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 28012998525 in words is "twenty-eight billion, twelve million, nine hundred ninety-eight thousand, five hundred twenty-five".