28723270 has 8 divisors (see below), whose sum is σ = 51701904. Its totient is φ = 11489304.

The previous prime is 28723249. The next prime is 28723309. The reversal of 28723270 is 7232782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436154 + ... + 1436173.

It is an arithmetic number, because the mean of its divisors is an integer number (6462738).

Almost surely, 2^28723270 is an apocalyptic number.

28723270 is a deficient number, since it is larger than the sum of its proper divisors (22978634).

28723270 is a wasteful number, since it uses less digits than its factorization.

28723270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872334.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 28723270 is about 5359.4094823964. The cubic root of 28723270 is about 306.2513136137.

The spelling of 28723270 in words is "twenty-eight million, seven hundred twenty-three thousand, two hundred seventy".