28377209540 has 48 divisors (see below), whose sum is σ = 63515539584. Its totient is φ = 10612416000.

The previous prime is 28377209521. The next prime is 28377209551. The reversal of 28377209540 is 4590277382.

It is a happy number.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225026 + ... + 327705.

It is an arithmetic number, because the mean of its divisors is an integer number (1323240408).

Almost surely, 2^28377209540 is an apocalyptic number.

28377209540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28377209540 is an abundant number, since it is smaller than the sum of its proper divisors (35138330044).

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

28377209540 is a wasteful number, since it uses less digits than its factorization.

28377209540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552908 (or 552906 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 28377209540 in words is "twenty-eight billion, three hundred seventy-seven million, two hundred nine thousand, five hundred forty".