28067977 has 8 divisors (see below), whose sum is σ = 32760576. Its totient is φ = 23546112.

The previous prime is 28067971. The next prime is 28067983. The reversal of 28067977 is 77976082.

It is an interprime number because it is at equal distance from previous prime (28067971) and next prime (28067983).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28067977 - 2⁷ = 28067849 is a prime.

It is a super-2 number, since 2×28067977² = 1575622665745058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28067971) 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, 42328 + ... + 42985.

It is an arithmetic number, because the mean of its divisors is an integer number (4095072).

Almost surely, 2^28067977 is an apocalyptic number.

It is an amenable number.

28067977 is a deficient number, since it is larger than the sum of its proper divisors (4692599).

28067977 is an equidigital number, since it uses as much as digits as its factorization.

28067977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85367.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 28067977 is about 5297.9219511050. The cubic root of 28067977 is about 303.9044345561.

The spelling of 28067977 in words is "twenty-eight million, sixty-seven thousand, nine hundred seventy-seven".