28380505835 has 24 divisors (see below), whose sum is σ = 37589643168. Its totient is φ = 20554617600.

The previous prime is 28380505801. The next prime is 28380505861. The reversal of 28380505835 is 53850508382.

It is not a de Polignac number, because 28380505835 - 2⁸ = 28380505579 is a prime.

It is a super-2 number, since 2×28380505835² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28380505835.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48482 + ... + 243128.

It is an arithmetic number, because the mean of its divisors is an integer number (1566235132).

Almost surely, 2^28380505835 is an apocalyptic number.

28380505835 is a deficient number, since it is larger than the sum of its proper divisors (9209137333).

28380505835 is a wasteful number, since it uses less digits than its factorization.

28380505835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194915 (or 194904 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 28380505835 in words is "twenty-eight billion, three hundred eighty million, five hundred five thousand, eight hundred thirty-five".