28277783278 has 8 divisors (see below), whose sum is σ = 42893267040. Its totient is φ = 13980027600.

The previous prime is 28277783273. The next prime is 28277783311. The reversal of 28277783278 is 87238777282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277783273) 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, 79431798 + ... + 79432153.

It is an arithmetic number, because the mean of its divisors is an integer number (5361658380).

Almost surely, 2^28277783278 is an apocalyptic number.

28277783278 is a deficient number, since it is larger than the sum of its proper divisors (14615483762).

28277783278 is a wasteful number, since it uses less digits than its factorization.

28277783278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158864042.

The product of its digits is 29503488, while the sum is 61.

The spelling of 28277783278 in words is "twenty-eight billion, two hundred seventy-seven million, seven hundred eighty-three thousand, two hundred seventy-eight".