28471944 has 32 divisors (see below), whose sum is σ = 73105920. Its totient is φ = 9233856.

The previous prime is 28471943. The next prime is 28471967. The reversal of 28471944 is 44917482.

It is not an unprimeable number, because it can be changed into a prime (28471943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15144 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (2284560).

Almost surely, 2^28471944 is an apocalyptic number.

28471944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28471944 is an abundant number, since it is smaller than the sum of its proper divisors (44633976).

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

28471944 is a wasteful number, since it uses less digits than its factorization.

28471944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32109 (or 32105 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 28471944 is about 5335.9107938570. The cubic root of 28471944 is about 305.3554719534.

The spelling of 28471944 in words is "twenty-eight million, four hundred seventy-one thousand, nine hundred forty-four".