28746481 has 4 divisors (see below), whose sum is σ = 29996352. Its totient is φ = 27496612.

The previous prime is 28746463. The next prime is 28746493. The reversal of 28746481 is 18464782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28746481 - 2¹³ = 28738289 is a prime.

It is a super-2 number, since 2×28746481² = 1652720339766722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28746181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624901 + ... + 624946.

It is an arithmetic number, because the mean of its divisors is an integer number (7499088).

Almost surely, 2^28746481 is an apocalyptic number.

It is an amenable number.

28746481 is a deficient number, since it is larger than the sum of its proper divisors (1249871).

28746481 is a wasteful number, since it uses less digits than its factorization.

28746481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249870.

The product of its digits is 86016, while the sum is 40.

The square root of 28746481 is about 5361.5744888978. The cubic root of 28746481 is about 306.3337843231. Note that the first 3 decimals are identical.

The spelling of 28746481 in words is "twenty-eight million, seven hundred forty-six thousand, four hundred eighty-one".