28916380 has 24 divisors (see below), whose sum is σ = 60827760. Its totient is φ = 11546880.

The previous prime is 28916369. The next prime is 28916387. The reversal of 28916380 is 8361982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916387) 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, 18676 + ... + 20164.

It is an arithmetic number, because the mean of its divisors is an integer number (2534490).

Almost surely, 2^28916380 is an apocalyptic number.

28916380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28916380 is an abundant number, since it is smaller than the sum of its proper divisors (31911380).

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

28916380 is a wasteful number, since it uses less digits than its factorization.

28916380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28916380 is about 5377.3952802449. The cubic root of 28916380 is about 306.9361027348.

The spelling of 28916380 in words is "twenty-eight million, nine hundred sixteen thousand, three hundred eighty".