28078732574 has 16 divisors (see below), whose sum is σ = 43064543808. Its totient is φ = 13724583552.

The previous prime is 28078732543. The next prime is 28078732579. The reversal of 28078732574 is 47523787082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078732579) 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, 93719 + ... + 254834.

It is an arithmetic number, because the mean of its divisors is an integer number (2691533988).

Almost surely, 2^28078732574 is an apocalyptic number.

28078732574 is a deficient number, since it is larger than the sum of its proper divisors (14985811234).

28078732574 is a wasteful number, since it uses less digits than its factorization.

28078732574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349459.

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 28078732574 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-two thousand, five hundred seventy-four".