28746671 has 4 divisors (see below), whose sum is σ = 28810032. Its totient is φ = 28683312.

The previous prime is 28746667. The next prime is 28746673. The reversal of 28746671 is 17664782.

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 28746671 - 2² = 28746667 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 (28746673) 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, 30995 + ... + 31908.

It is an arithmetic number, because the mean of its divisors is an integer number (7202508).

Almost surely, 2^28746671 is an apocalyptic number.

28746671 is a deficient number, since it is larger than the sum of its proper divisors (63361).

28746671 is an equidigital number, since it uses as much as digits as its factorization.

28746671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63360.

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

The square root of 28746671 is about 5361.5922075443. The cubic root of 28746671 is about 306.3344592264.

The spelling of 28746671 in words is "twenty-eight million, seven hundred forty-six thousand, six hundred seventy-one".