28038080 has 56 divisors (see below), whose sum is σ = 76309728. Its totient is φ = 9612288.

The previous prime is 28038079. The next prime is 28038089. The reversal of 28038080 is 8083082.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×28038080² = 1572267860172800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4019 + ... + 8498.

Almost surely, 2^28038080 is an apocalyptic number.

28038080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28038080 is an abundant number, since it is smaller than the sum of its proper divisors (48271648).

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

28038080 is a wasteful number, since it uses less digits than its factorization.

28038080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12541 (or 12531 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28038080 is about 5295.0996213480. The cubic root of 28038080 is about 303.7964935295.

The spelling of 28038080 in words is "twenty-eight million, thirty-eight thousand, eighty".