28777737078 has 64 divisors (see below), whose sum is σ = 64364544000. Its totient is φ = 9530611200.

The previous prime is 28777737077. The next prime is 28777737101. The reversal of 28777737078 is 87073777782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777737077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11994523 + ... + 11996921.

It is an arithmetic number, because the mean of its divisors is an integer number (1005696000).

Almost surely, 2^28777737078 is an apocalyptic number.

28777737078 is an abundant number, since it is smaller than the sum of its proper divisors (35586806922).

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

28777737078 is a wasteful number, since it uses less digits than its factorization.

28777737078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754 (or 3748 counting only the distinct ones).

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

The spelling of 28777737078 in words is "twenty-eight billion, seven hundred seventy-seven million, seven hundred thirty-seven thousand, seventy-eight".