28715470 has 24 divisors (see below), whose sum is σ = 60127704. Its totient is φ = 9845136.

The previous prime is 28715437. The next prime is 28715471. The reversal of 28715470 is 7451782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28715471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28812 + ... + 29791.

It is an arithmetic number, because the mean of its divisors is an integer number (2505321).

Almost surely, 2^28715470 is an apocalyptic number.

28715470 is an abundant number, since it is smaller than the sum of its proper divisors (31412234).

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

28715470 is a wasteful number, since it uses less digits than its factorization.

28715470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58624 (or 58617 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 28715470 is about 5358.6817408762. The cubic root of 28715470 is about 306.2235895592.

The spelling of 28715470 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred seventy".