28746478 has 8 divisors (see below), whose sum is σ = 43288272. Its totient is φ = 14317056.

The previous prime is 28746463. The next prime is 28746493. The reversal of 28746478 is 87464782.

It is an interprime number because it is at equal distance from previous prime (28746463) and next prime (28746493).

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27450 + ... + 28477.

It is an arithmetic number, because the mean of its divisors is an integer number (5411034).

Almost surely, 2^28746478 is an apocalyptic number.

28746478 is a deficient number, since it is larger than the sum of its proper divisors (14541794).

28746478 is a wasteful number, since it uses less digits than its factorization.

28746478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56186.

The product of its digits is 602112, while the sum is 46.

The square root of 28746478 is about 5361.5742091293. The cubic root of 28746478 is about 306.3337736667. Note that the first 3 decimals are identical.

The spelling of 28746478 in words is "twenty-eight million, seven hundred forty-six thousand, four hundred seventy-eight".