28723068 has 36 divisors (see below), whose sum is σ = 79207128. Its totient is φ = 8703840.

The previous prime is 28723061. The next prime is 28723073. The reversal of 28723068 is 86032782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28723061) 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, 35871 + ... + 36662.

It is an arithmetic number, because the mean of its divisors is an integer number (2200198).

Almost surely, 2^28723068 is an apocalyptic number.

It is an amenable number.

28723068 is an abundant number, since it is smaller than the sum of its proper divisors (50484060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28723068 is a wasteful number, since it uses less digits than its factorization.

28723068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72554 (or 72549 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28723068 is about 5359.3906370034. The cubic root of 28723068 is about 306.2505956951.

The spelling of 28723068 in words is "twenty-eight million, seven hundred twenty-three thousand, sixty-eight".