28195982440 has 64 divisors (see below), whose sum is σ = 67607861760. Its totient is φ = 10558479360.

The previous prime is 28195982411. The next prime is 28195982461. The reversal of 28195982440 is 4428959182.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282801 + ... + 369280.

It is an arithmetic number, because the mean of its divisors is an integer number (1056372840).

Almost surely, 2^28195982440 is an apocalyptic number.

28195982440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28195982440 is an abundant number, since it is smaller than the sum of its proper divisors (39411879320).

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

28195982440 is a wasteful number, since it uses less digits than its factorization.

28195982440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652162 (or 652158 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 28195982440 in words is "twenty-eight billion, one hundred ninety-five million, nine hundred eighty-two thousand, four hundred forty".