28471378 has 32 divisors (see below), whose sum is σ = 49061376. Its totient is φ = 12289728.

The previous prime is 28471349. The next prime is 28471411. The reversal of 28471378 is 87317482.

It is a self number, because there is not a number n which added to its sum of digits gives 28471378.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27600 + ... + 28612.

It is an arithmetic number, because the mean of its divisors is an integer number (1533168).

Almost surely, 2^28471378 is an apocalyptic number.

28471378 is a deficient number, since it is larger than the sum of its proper divisors (20589998).

28471378 is a wasteful number, since it uses less digits than its factorization.

28471378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its digits is 75264, while the sum is 40.

The square root of 28471378 is about 5335.8577567248. The cubic root of 28471378 is about 305.3534485306.

It can be divided in two parts, 2847 and 1378, that added together give a square (4225 = 65²).

The spelling of 28471378 in words is "twenty-eight million, four hundred seventy-one thousand, three hundred seventy-eight".