28077516 has 60 divisors (see below), whose sum is σ = 77280280. Its totient is φ = 8864640.

The previous prime is 28077509. The next prime is 28077521. The reversal of 28077516 is 61577082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3876 + ... + 8436.

Almost surely, 2^28077516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28077516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38640140).

28077516 is an abundant number, since it is smaller than the sum of its proper divisors (49202764).

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

28077516 is a wasteful number, since it uses less digits than its factorization.

28077516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596 (or 4585 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28077516 is about 5298.8221332670. The cubic root of 28077516 is about 303.9388583178.

The spelling of 28077516 in words is "twenty-eight million, seventy-seven thousand, five hundred sixteen".