28723810 has 16 divisors (see below), whose sum is σ = 52327296. Its totient is φ = 11350768.

The previous prime is 28723781. The next prime is 28723811. The reversal of 28723810 is 1832782.

It is a super-2 number, since 2×28723810² = 1650114521832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28723811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16474 + ... + 18133.

It is an arithmetic number, because the mean of its divisors is an integer number (3270456).

Almost surely, 2^28723810 is an apocalyptic number.

28723810 is a deficient number, since it is larger than the sum of its proper divisors (23603486).

28723810 is a wasteful number, since it uses less digits than its factorization.

28723810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34697.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28723810 is about 5359.4598608442. The cubic root of 28723810 is about 306.2532327855.

The spelling of 28723810 in words is "twenty-eight million, seven hundred twenty-three thousand, eight hundred ten".