28778706254 has 16 divisors (see below), whose sum is σ = 45048590208. Its totient is φ = 13762611192.

The previous prime is 28778706251. The next prime is 28778706337. The reversal of 28778706254 is 45260787782.

It is a self number, because there is not a number n which added to its sum of digits gives 28778706254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28778706251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948629 + ... + 978495.

It is an arithmetic number, because the mean of its divisors is an integer number (2815536888).

Almost surely, 2^28778706254 is an apocalyptic number.

28778706254 is a deficient number, since it is larger than the sum of its proper divisors (16269883954).

28778706254 is a wasteful number, since it uses less digits than its factorization.

28778706254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50839.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 28778706254 in words is "twenty-eight billion, seven hundred seventy-eight million, seven hundred six thousand, two hundred fifty-four".