28461967 has 4 divisors (see below), whose sum is σ = 28475656. Its totient is φ = 28448280.

The previous prime is 28461959. The next prime is 28461973. The reversal of 28461967 is 76916482.

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 28461967 - 2³ = 28461959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461907) 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, 3009 + ... + 8122.

It is an arithmetic number, because the mean of its divisors is an integer number (7118914).

Almost surely, 2^28461967 is an apocalyptic number.

28461967 is a deficient number, since it is larger than the sum of its proper divisors (13689).

28461967 is a wasteful number, since it uses less digits than its factorization.

28461967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13688.

The product of its digits is 145152, while the sum is 43.

The square root of 28461967 is about 5334.9758200014. The cubic root of 28461967 is about 305.3198007272.

The spelling of 28461967 in words is "twenty-eight million, four hundred sixty-one thousand, nine hundred sixty-seven".