28447468 has 12 divisors (see below), whose sum is σ = 56894992. Its totient is φ = 12191760.

The previous prime is 28447451. The next prime is 28447483. The reversal of 28447468 is 86474482.

28447468 is an admirable number.

It is a super-2 number, since 2×28447468² = 1618516871222048, which contains 22 as substring.

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, 507963 + ... + 508018.

Almost surely, 2^28447468 is an apocalyptic number.

28447468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28447468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28447468 is a wasteful number, since it uses less digits than its factorization.

28447468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015992 (or 1015990 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 28447468 is about 5333.6167841344. The cubic root of 28447468 is about 305.2679469241.

The spelling of 28447468 in words is "twenty-eight million, four hundred forty-seven thousand, four hundred sixty-eight".