28881507040 has 48 divisors (see below), whose sum is σ = 68730660432. Its totient is φ = 11468268544.

The previous prime is 28881507037. The next prime is 28881507049. The reversal of 28881507040 is 4070518882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28881507049) 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, 636874 + ... + 680713.

It is an arithmetic number, because the mean of its divisors is an integer number (1431888759).

Almost surely, 2^28881507040 is an apocalyptic number.

28881507040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28881507040 is an abundant number, since it is smaller than the sum of its proper divisors (39849153392).

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

28881507040 is a wasteful number, since it uses less digits than its factorization.

28881507040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317739 (or 1317731 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 43.

The spelling of 28881507040 in words is "twenty-eight billion, eight hundred eighty-one million, five hundred seven thousand, forty".