65857398 has 16 divisors (see below), whose sum is σ = 134927856. Its totient is φ = 21416960.

The previous prime is 65857321. The next prime is 65857411. The reversal of 65857398 is 89375856.

It is a self number, because there is not a number n which added to its sum of digits gives 65857398.

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, 133611 + ... + 134102.

It is an arithmetic number, because the mean of its divisors is an integer number (8432991).

Almost surely, 2^65857398 is an apocalyptic number.

65857398 is an abundant number, since it is smaller than the sum of its proper divisors (69070458).

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

65857398 is a wasteful number, since it uses less digits than its factorization.

65857398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267759.

The product of its digits is 1814400, while the sum is 51.

The square root of 65857398 is about 8115.2571123779. The cubic root of 65857398 is about 403.8327371841.

The spelling of 65857398 in words is "sixty-five million, eight hundred fifty-seven thousand, three hundred ninety-eight".