28287017430 has 192 divisors, whose sum is σ = 81678792960. Its totient is φ = 6247777536.

The previous prime is 28287017399. The next prime is 28287017453. The reversal of 28287017430 is 3471078282.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5217261 + ... + 5222679.

It is an arithmetic number, because the mean of its divisors is an integer number (425410380).

Almost surely, 2^28287017430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28287017430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40839396480).

28287017430 is an abundant number, since it is smaller than the sum of its proper divisors (53391775530).

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

28287017430 is a wasteful number, since it uses less digits than its factorization.

28287017430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563 (or 5556 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 28287017430 in words is "twenty-eight billion, two hundred eighty-seven million, seventeen thousand, four hundred thirty".