28377767427 has 16 divisors (see below), whose sum is σ = 38119254432. Its totient is φ = 18777657600.

The previous prime is 28377767393. The next prime is 28377767441. The reversal of 28377767427 is 72476777382.

It is not a de Polignac number, because 28377767427 - 2³⁰ = 27304025603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28377767447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409177 + ... + 473477.

It is an arithmetic number, because the mean of its divisors is an integer number (2382453402).

Almost surely, 2^28377767427 is an apocalyptic number.

28377767427 is a deficient number, since it is larger than the sum of its proper divisors (9741487005).

28377767427 is a wasteful number, since it uses less digits than its factorization.

28377767427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65398.

The product of its digits is 38723328, while the sum is 60.

The spelling of 28377767427 in words is "twenty-eight billion, three hundred seventy-seven million, seven hundred sixty-seven thousand, four hundred twenty-seven".