28457694 has 48 divisors (see below), whose sum is σ = 65943072. Its totient is φ = 8838144.

The previous prime is 28457683. The next prime is 28457707. The reversal of 28457694 is 49675482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34167 + ... + 34989.

It is an arithmetic number, because the mean of its divisors is an integer number (1373814).

Almost surely, 2^28457694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28457694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32971536).

28457694 is an abundant number, since it is smaller than the sum of its proper divisors (37485378).

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

28457694 is a wasteful number, since it uses less digits than its factorization.

28457694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 958 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28457694 is about 5334.5753345510. The cubic root of 28457694 is about 305.3045207245.

The spelling of 28457694 in words is "twenty-eight million, four hundred fifty-seven thousand, six hundred ninety-four".