28399295380 has 12 divisors (see below), whose sum is σ = 59638520340. Its totient is φ = 11359718144.

The previous prime is 28399295341. The next prime is 28399295389. The reversal of 28399295380 is 8359299382.

It can be written as a sum of positive squares in 2 ways, for example, as 5470673296 + 22928622084 = 73964^2 + 151422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28399295389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709982365 + ... + 709982404.

It is an arithmetic number, because the mean of its divisors is an integer number (4969876695).

Almost surely, 2^28399295380 is an apocalyptic number.

28399295380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28399295380 is an abundant number, since it is smaller than the sum of its proper divisors (31239224960).

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

28399295380 is a wasteful number, since it uses less digits than its factorization.

28399295380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419964778 (or 1419964776 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 28399295380 in words is "twenty-eight billion, three hundred ninety-nine million, two hundred ninety-five thousand, three hundred eighty".