28001554520 has 16 divisors (see below), whose sum is σ = 63003497760. Its totient is φ = 11200621792.

The previous prime is 28001554519. The next prime is 28001554523. The reversal of 28001554520 is 2545510082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001554523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350019392 + ... + 350019471.

It is an arithmetic number, because the mean of its divisors is an integer number (3937718610).

Almost surely, 2^28001554520 is an apocalyptic number.

28001554520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28001554520 is an abundant number, since it is smaller than the sum of its proper divisors (35001943240).

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

28001554520 is a wasteful number, since it uses less digits than its factorization.

28001554520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700038874 (or 700038870 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 28001554520 in words is "twenty-eight billion, one million, five hundred fifty-four thousand, five hundred twenty".