28433967 has 4 divisors (see below), whose sum is σ = 37911960. Its totient is φ = 18955976.

The previous prime is 28433963. The next prime is 28433989. The reversal of 28433967 is 76933482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28433967 - 2² = 28433963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28433963) 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, 4738992 + ... + 4738997.

It is an arithmetic number, because the mean of its divisors is an integer number (9477990).

Almost surely, 2^28433967 is an apocalyptic number.

28433967 is a deficient number, since it is larger than the sum of its proper divisors (9477993).

28433967 is an equidigital number, since it uses as much as digits as its factorization.

28433967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477992.

The product of its digits is 217728, while the sum is 42.

The square root of 28433967 is about 5332.3509824467. The cubic root of 28433967 is about 305.2196464951.

The spelling of 28433967 in words is "twenty-eight million, four hundred thirty-three thousand, nine hundred sixty-seven".