28472685 has 8 divisors (see below), whose sum is σ = 45556320. Its totient is φ = 15185424.

The previous prime is 28472681. The next prime is 28472707. The reversal of 28472685 is 58627482.

It is a happy number.

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

It is not a de Polignac number, because 28472685 - 2² = 28472681 is a prime.

It is a super-2 number, since 2×28472685² = 1621387582218450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28472681) 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, 949075 + ... + 949104.

It is an arithmetic number, because the mean of its divisors is an integer number (5694540).

Almost surely, 2^28472685 is an apocalyptic number.

It is an amenable number.

28472685 is a deficient number, since it is larger than the sum of its proper divisors (17083635).

28472685 is a wasteful number, since it uses less digits than its factorization.

28472685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898187.

The product of its digits is 215040, while the sum is 42.

The square root of 28472685 is about 5335.9802285991. The cubic root of 28472685 is about 305.3581209523.

The spelling of 28472685 in words is "twenty-eight million, four hundred seventy-two thousand, six hundred eighty-five".