28535740240 has 40 divisors (see below), whose sum is σ = 75823539840. Its totient is φ = 9783682176.

The previous prime is 28535740231. The next prime is 28535740243. The reversal of 28535740240 is 4204753582.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 28535740193 and 28535740202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28535740243) 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, 25477780 + ... + 25478899.

It is an arithmetic number, because the mean of its divisors is an integer number (1895588496).

Almost surely, 2^28535740240 is an apocalyptic number.

28535740240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28535740240 is an abundant number, since it is smaller than the sum of its proper divisors (47287799600).

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

28535740240 is a wasteful number, since it uses less digits than its factorization.

28535740240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50956699 (or 50956693 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The spelling of 28535740240 in words is "twenty-eight billion, five hundred thirty-five million, seven hundred forty thousand, two hundred forty".