28726447932 has 384 divisors, whose sum is σ = 94290739200. Its totient is φ = 7362254592.

The previous prime is 28726447877. The next prime is 28726447949. The reversal of 28726447932 is 23974462782.

28726447932 is a `hidden beast` number, since 2 + 87 + 2 + 64 + 479 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 62043933 + ... + 62044395.

It is an arithmetic number, because the mean of its divisors is an integer number (245548800).

Almost surely, 2^28726447932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28726447932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47145369600).

28726447932 is an abundant number, since it is smaller than the sum of its proper divisors (65564291268).

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

28726447932 is a wasteful number, since it uses less digits than its factorization.

28726447932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 654 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 28726447932 in words is "twenty-eight billion, seven hundred twenty-six million, four hundred forty-seven thousand, nine hundred thirty-two".