28873680 has 80 divisors (see below), whose sum is σ = 97654464. Its totient is φ = 6999040.

The previous prime is 28873627. The next prime is 28873687. The reversal of 28873680 is 8637882.

28873680 = T₂₉₆ + T₂₉₇ + ... + T₅₈₃.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28873687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2829 + ... + 8108.

Almost surely, 2^28873680 is an apocalyptic number.

28873680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28873680 is an abundant number, since it is smaller than the sum of its proper divisors (68780784).

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

28873680 is a wasteful number, since it uses less digits than its factorization.

28873680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964 (or 10958 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28873680 is about 5373.4234897317. The cubic root of 28873680 is about 306.7849470224.

The spelling of 28873680 in words is "twenty-eight million, eight hundred seventy-three thousand, six hundred eighty".