28931414 has 32 divisors (see below), whose sum is σ = 47416320. Its totient is φ = 13195008.

The previous prime is 28931411. The next prime is 28931423. The reversal of 28931414 is 41413982.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28931411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173159 + ... + 173325.

It is an arithmetic number, because the mean of its divisors is an integer number (1481760).

Almost surely, 2^28931414 is an apocalyptic number.

28931414 is a deficient number, since it is larger than the sum of its proper divisors (18484906).

28931414 is a wasteful number, since it uses less digits than its factorization.

28931414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

The product of its digits is 6912, while the sum is 32.

The square root of 28931414 is about 5378.7929872788. The cubic root of 28931414 is about 306.9892868688.

The spelling of 28931414 in words is "twenty-eight million, nine hundred thirty-one thousand, four hundred fourteen".