28809524540 has 12 divisors (see below), whose sum is σ = 60500001576. Its totient is φ = 11523809808.

The previous prime is 28809524473. The next prime is 28809524561. The reversal of 28809524540 is 4542590882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720238094 + ... + 720238133.

It is an arithmetic number, because the mean of its divisors is an integer number (5041666798).

Almost surely, 2^28809524540 is an apocalyptic number.

28809524540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28809524540 is an abundant number, since it is smaller than the sum of its proper divisors (31690477036).

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

28809524540 is a wasteful number, since it uses less digits than its factorization.

28809524540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440476236 (or 1440476234 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 28809524540 in words is "twenty-eight billion, eight hundred nine million, five hundred twenty-four thousand, five hundred forty".