28715745730 has 32 divisors (see below), whose sum is σ = 60040800000. Its totient is φ = 9683997120.

The previous prime is 28715745649. The next prime is 28715745739. The reversal of 28715745730 is 3754751782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28715745739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3358230 + ... + 3366769.

It is an arithmetic number, because the mean of its divisors is an integer number (1876275000).

Almost surely, 2^28715745730 is an apocalyptic number.

28715745730 is an abundant number, since it is smaller than the sum of its proper divisors (31325054270).

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

28715745730 is a wasteful number, since it uses less digits than its factorization.

28715745730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6725074.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 28715745730 in words is "twenty-eight billion, seven hundred fifteen million, seven hundred forty-five thousand, seven hundred thirty".