28728583870 has 96 divisors (see below), whose sum is σ = 63937036800. Its totient is φ = 9240485184.

The previous prime is 28728583783. The next prime is 28728583879. The reversal of 28728583870 is 7838582782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728583879) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 943951 + ... + 973909.

It is an arithmetic number, because the mean of its divisors is an integer number (666010800).

Almost surely, 2^28728583870 is an apocalyptic number.

28728583870 is an abundant number, since it is smaller than the sum of its proper divisors (35208452930).

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

28728583870 is a wasteful number, since it uses less digits than its factorization.

28728583870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30102 (or 30095 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 58.

The spelling of 28728583870 in words is "twenty-eight billion, seven hundred twenty-eight million, five hundred eighty-three thousand, eight hundred seventy".