28377787707 has 12 divisors (see below), whose sum is σ = 41059975320. Its totient is φ = 18886292448.

The previous prime is 28377787703. The next prime is 28377787709. The reversal of 28377787707 is 70778777382.

It is not a de Polignac number, because 28377787707 - 2² = 28377787703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28377787703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2680482 + ... + 2691047.

It is an arithmetic number, because the mean of its divisors is an integer number (3421664610).

Almost surely, 2^28377787707 is an apocalyptic number.

28377787707 is a deficient number, since it is larger than the sum of its proper divisors (12682187613).

28377787707 is a wasteful number, since it uses less digits than its factorization.

28377787707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372122 (or 5372119 counting only the distinct ones).

The product of its (nonzero) digits is 45177216, while the sum is 63.

The spelling of 28377787707 in words is "twenty-eight billion, three hundred seventy-seven million, seven hundred eighty-seven thousand, seven hundred seven".