28371967 has 8 divisors (see below), whose sum is σ = 30595824. Its totient is φ = 26154048.

The previous prime is 28371923. The next prime is 28371971. The reversal of 28371967 is 76917382.

It is a happy number.

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 28371967 - 2⁷ = 28371839 is a prime.

It is a super-2 number, since 2×28371967² = 1609937022898178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371977) 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, 17868 + ... + 19390.

It is an arithmetic number, because the mean of its divisors is an integer number (3824478).

Almost surely, 2^28371967 is an apocalyptic number.

28371967 is a deficient number, since it is larger than the sum of its proper divisors (2223857).

28371967 is a wasteful number, since it uses less digits than its factorization.

28371967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969.

The product of its digits is 127008, while the sum is 43.

The square root of 28371967 is about 5326.5342390714. The cubic root of 28371967 is about 304.9976421926.

The spelling of 28371967 in words is "twenty-eight million, three hundred seventy-one thousand, nine hundred sixty-seven".