28070016 has 64 divisors (see below), whose sum is σ = 80310720. Its totient is φ = 8635392.

The previous prime is 28069997. The next prime is 28070047. The reversal of 28070016 is 61007082.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (1254855).

Almost surely, 2^28070016 is an apocalyptic number.

28070016 is a gapful number since it is divisible by the number (26) 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 28070016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40155360).

28070016 is an abundant number, since it is smaller than the sum of its proper divisors (52240704).

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

28070016 is a wasteful number, since it uses less digits than its factorization.

28070016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5653 (or 5641 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 28070016 is about 5298.1143815512. The cubic root of 28070016 is about 303.9117934303.

Adding to 28070016 its reverse (61007082), we get a palindrome (89077098).

The spelling of 28070016 in words is "twenty-eight million, seventy thousand, sixteen".