87828705 has 24 divisors (see below), whose sum is σ = 157876992. Its totient is φ = 46841328.

The previous prime is 87828649. The next prime is 87828731. The reversal of 87828705 is 50782878.

It is a happy number.

It is not a de Polignac number, because 87828705 - 2⁶ = 87828641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 34929 + ... + 37358.

It is an arithmetic number, because the mean of its divisors is an integer number (6578208).

Almost surely, 2^87828705 is an apocalyptic number.

It is an amenable number.

87828705 is a deficient number, since it is larger than the sum of its proper divisors (70048287).

87828705 is an equidigital number, since it uses as much as digits as its factorization.

87828705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72307 (or 72295 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 87828705 is about 9371.6970181499. The cubic root of 87828705 is about 444.5072271146.

The spelling of 87828705 in words is "eighty-seven million, eight hundred twenty-eight thousand, seven hundred five".