28380677 has 12 divisors (see below), whose sum is σ = 31246884. Its totient is φ = 25758720.

The previous prime is 28380673. The next prime is 28380707. The reversal of 28380677 is 77608382.

It can be written as a sum of positive squares in 6 ways, for example, as 5013121 + 23367556 = 2239^2 + 4834^2 .

It is not a de Polignac number, because 28380677 - 2² = 28380673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8933 + ... + 11685.

It is an arithmetic number, because the mean of its divisors is an integer number (2603907).

Almost surely, 2^28380677 is an apocalyptic number.

It is an amenable number.

28380677 is a deficient number, since it is larger than the sum of its proper divisors (2866207).

28380677 is a wasteful number, since it uses less digits than its factorization.

28380677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840 (or 2827 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28380677 is about 5327.3517811385. The cubic root of 28380677 is about 305.0288497301.

The spelling of 28380677 in words is "twenty-eight million, three hundred eighty thousand, six hundred seventy-seven".