28497893040 has 280 divisors, whose sum is σ = 100274705520. Its totient is φ = 7528038912.

The previous prime is 28497892987. The next prime is 28497893059. The reversal of 28497893040 is 4039879482.

28497893040 is a `hidden beast` number, since 2 + 8 + 497 + 89 + 30 + 40 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 6354639 + ... + 6359121.

Almost surely, 2^28497893040 is an apocalyptic number.

28497893040 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 28497893040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50137352760).

28497893040 is an abundant number, since it is smaller than the sum of its proper divisors (71776812480).

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

28497893040 is a wasteful number, since it uses less digits than its factorization.

28497893040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623 (or 4602 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28497893040 in words is "twenty-eight billion, four hundred ninety-seven million, eight hundred ninety-three thousand, forty".