28734923 has 12 divisors (see below), whose sum is σ = 34506432. Its totient is φ = 23834160.

The previous prime is 28734919. The next prime is 28734929. The reversal of 28734923 is 32943782.

It is a happy number.

It is not a de Polignac number, because 28734923 - 2² = 28734919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28734929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7940 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (2875536).

Almost surely, 2^28734923 is an apocalyptic number.

28734923 is a deficient number, since it is larger than the sum of its proper divisors (5771509).

28734923 is a wasteful number, since it uses less digits than its factorization.

28734923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18962 (or 18955 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 28734923 is about 5360.4965255096. The cubic root of 28734923 is about 306.2927232913.

The spelling of 28734923 in words is "twenty-eight million, seven hundred thirty-four thousand, nine hundred twenty-three".