28715402 has 8 divisors (see below), whose sum is σ = 43989696. Its totient is φ = 14052172.

The previous prime is 28715389. The next prime is 28715413. The reversal of 28715402 is 20451782.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 152648 + ... + 152835.

It is an arithmetic number, because the mean of its divisors is an integer number (5498712).

Almost surely, 2^28715402 is an apocalyptic number.

28715402 is a deficient number, since it is larger than the sum of its proper divisors (15274294).

28715402 is a wasteful number, since it uses less digits than its factorization.

28715402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305532.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28715402 is about 5358.6753960284. The cubic root of 28715402 is about 306.2233478403.

The spelling of 28715402 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred two".