28077760 has 28 divisors (see below), whose sum is σ = 66860928. Its totient is φ = 11230976.

The previous prime is 28077719. The next prime is 28077767. The reversal of 28077760 is 6777082.

It is not an unprimeable number, because it can be changed into a prime (28077767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43552 + ... + 44191.

Almost surely, 2^28077760 is an apocalyptic number.

28077760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28077760 is an abundant number, since it is smaller than the sum of its proper divisors (38783168).

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

28077760 is an equidigital number, since it uses as much as digits as its factorization.

28077760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87760 (or 87750 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 28077760 is about 5298.8451572017. The cubic root of 28077760 is about 303.9397387479.

The spelling of 28077760 in words is "twenty-eight million, seventy-seven thousand, seven hundred sixty".