28334478 has 16 divisors (see below), whose sum is σ = 60002640. Its totient is φ = 8889216.

The previous prime is 28334473. The next prime is 28334519. The reversal of 28334478 is 87443382.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138793 + ... + 138996.

It is an arithmetic number, because the mean of its divisors is an integer number (3750165).

Almost surely, 2^28334478 is an apocalyptic number.

28334478 is an abundant number, since it is smaller than the sum of its proper divisors (31668162).

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

28334478 is a wasteful number, since it uses less digits than its factorization.

28334478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277811.

The product of its digits is 129024, while the sum is 39.

The square root of 28334478 is about 5323.0139958486. The cubic root of 28334478 is about 304.8632478402.

The spelling of 28334478 in words is "twenty-eight million, three hundred thirty-four thousand, four hundred seventy-eight".