28167040 has 64 divisors (see below), whose sum is σ = 73476720. Its totient is φ = 10240000.

The previous prime is 28166993. The next prime is 28167043. The reversal of 28167040 is 4076182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28167043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5040 + ... + 9040.

Almost surely, 2^28167040 is an apocalyptic number.

28167040 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 28167040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36738360).

28167040 is an abundant number, since it is smaller than the sum of its proper divisors (45309680).

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

28167040 is a wasteful number, since it uses less digits than its factorization.

28167040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4019 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28167040 is about 5307.2629480741. The cubic root of 28167040 is about 304.2615477649.

The spelling of 28167040 in words is "twenty-eight million, one hundred sixty-seven thousand, forty".