28111963040 has 192 divisors, whose sum is σ = 77090517504. Its totient is φ = 9488683008.

The previous prime is 28111963021. The next prime is 28111963043. The reversal of 28111963040 is 4036911182.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (28111963043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22725302 + ... + 22726538.

It is an arithmetic number, because the mean of its divisors is an integer number (401513112).

Almost surely, 2^28111963040 is an apocalyptic number.

28111963040 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 28111963040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38545258752).

28111963040 is an abundant number, since it is smaller than the sum of its proper divisors (48978554464).

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

28111963040 is a wasteful number, since it uses less digits than its factorization.

28111963040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 28111963040 in words is "twenty-eight billion, one hundred eleven million, nine hundred sixty-three thousand, forty".