65828889 has 32 divisors (see below), whose sum is σ = 111872000. Its totient is φ = 37476432.

The previous prime is 65828849. The next prime is 65828897. The reversal of 65828889 is 98882856.

It is not a de Polignac number, because 65828889 - 2⁹ = 65828377 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65828849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71172 + ... + 72090.

It is an arithmetic number, because the mean of its divisors is an integer number (3496000).

Almost surely, 2^65828889 is an apocalyptic number.

It is an amenable number.

65828889 is a deficient number, since it is larger than the sum of its proper divisors (46043111).

65828889 is a wasteful number, since it uses less digits than its factorization.

65828889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1308 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 65828889 is about 8113.5004159734. The cubic root of 65828889 is about 403.7744570743.

The spelling of 65828889 in words is "sixty-five million, eight hundred twenty-eight thousand, eight hundred eighty-nine".