28837111680 has 384 divisors, whose sum is σ = 112887684000. Its totient is φ = 6724435968.

The previous prime is 28837111673. The next prime is 28837111729. The reversal of 28837111680 is 8611173882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1412586 + ... + 1432854.

Almost surely, 2^28837111680 is an apocalyptic number.

28837111680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28837111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56443842000).

28837111680 is an abundant number, since it is smaller than the sum of its proper divisors (84050572320).

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

28837111680 is a wasteful number, since it uses less digits than its factorization.

28837111680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20326 (or 20311 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 28837111680 in words is "twenty-eight billion, eight hundred thirty-seven million, one hundred eleven thousand, six hundred eighty".