28873730 has 16 divisors (see below), whose sum is σ = 54708480. Its totient is φ = 10941552.

The previous prime is 28873729. The next prime is 28873751. The reversal of 28873730 is 3737882.

It is a super-2 number, since 2×28873730² = 1667384568225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75794 + ... + 76173.

It is an arithmetic number, because the mean of its divisors is an integer number (3419280).

Almost surely, 2^28873730 is an apocalyptic number.

28873730 is a deficient number, since it is larger than the sum of its proper divisors (25834750).

28873730 is a wasteful number, since it uses less digits than its factorization.

28873730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151993.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 28873730 is about 5373.4281422570. The cubic root of 28873730 is about 306.7851241068.

The spelling of 28873730 in words is "twenty-eight million, eight hundred seventy-three thousand, seven hundred thirty".