28061319240 has 192 divisors, whose sum is σ = 95464474560. Its totient is φ = 7412808960.

The previous prime is 28061319193. The next prime is 28061319259. The reversal of 28061319240 is 4291316082.

28061319240 is a `hidden beast` number, since 2 + 8 + 0 + 613 + 19 + 24 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28061319195 and 28061319204.

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, 1026550 + ... + 1053530.

It is an arithmetic number, because the mean of its divisors is an integer number (497210805).

Almost surely, 2^28061319240 is an apocalyptic number.

28061319240 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 28061319240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47732237280).

28061319240 is an abundant number, since it is smaller than the sum of its proper divisors (67403155320).

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

28061319240 is a wasteful number, since it uses less digits than its factorization.

28061319240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27114 (or 27098 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 28061319240 in words is "twenty-eight billion, sixty-one million, three hundred nineteen thousand, two hundred forty".