28701563 has 6 divisors (see below), whose sum is σ = 31548132. Its totient is φ = 26092220.

The previous prime is 28701551. The next prime is 28701601. The reversal of 28701563 is 36510782.

It is a happy number.

It is not a de Polignac number, because 28701563 - 2⁶ = 28701499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28701863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118481 + ... + 118722.

It is an arithmetic number, because the mean of its divisors is an integer number (5258022).

Almost surely, 2^28701563 is an apocalyptic number.

28701563 is a deficient number, since it is larger than the sum of its proper divisors (2846569).

28701563 is a wasteful number, since it uses less digits than its factorization.

28701563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237225 (or 237214 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28701563 is about 5357.3839698121. The cubic root of 28701563 is about 306.1741465338.

The spelling of 28701563 in words is "twenty-eight million, seven hundred one thousand, five hundred sixty-three".