28288777390 has 16 divisors (see below), whose sum is σ = 50925363840. Its totient is φ = 11314274400.

The previous prime is 28288777381. The next prime is 28288777397. The reversal of 28288777390 is 9377788282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288777397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55461 + ... + 244240.

It is an arithmetic number, because the mean of its divisors is an integer number (3182835240).

Almost surely, 2^28288777390 is an apocalyptic number.

28288777390 is a deficient number, since it is larger than the sum of its proper divisors (22636586450).

28288777390 is a wasteful number, since it uses less digits than its factorization.

28288777390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309147.

The product of its (nonzero) digits is 18966528, while the sum is 61.

The spelling of 28288777390 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred seventy-seven thousand, three hundred ninety".