65839420 has 24 divisors (see below), whose sum is σ = 138799584. Its totient is φ = 26233536.

The previous prime is 65839393. The next prime is 65839439. The reversal of 65839420 is 2493856.

It is a self number, because there is not a number n which added to its sum of digits gives 65839420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999 + ... + 11518.

It is an arithmetic number, because the mean of its divisors is an integer number (5783316).

Almost surely, 2^65839420 is an apocalyptic number.

It is an amenable number.

65839420 is an abundant number, since it is smaller than the sum of its proper divisors (72960164).

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

65839420 is a wasteful number, since it uses less digits than its factorization.

65839420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12789 (or 12787 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 65839420 is about 8114.1493700819. The cubic root of 65839420 is about 403.7959872472.

The spelling of 65839420 in words is "sixty-five million, eight hundred thirty-nine thousand, four hundred twenty".