65928431 has 4 divisors (see below), whose sum is σ = 69806592. Its totient is φ = 62050272.

The previous prime is 65928383. The next prime is 65928433. The reversal of 65928431 is 13482956.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-65928431 is a prime.

It is a super-2 number, since 2×65928431² = 8693116028243522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65928433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939055 + ... + 1939088.

It is an arithmetic number, because the mean of its divisors is an integer number (17451648).

Almost surely, 2^65928431 is an apocalyptic number.

65928431 is a deficient number, since it is larger than the sum of its proper divisors (3878161).

65928431 is a wasteful number, since it uses less digits than its factorization.

65928431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878160.

The product of its digits is 51840, while the sum is 38.

The square root of 65928431 is about 8119.6324424200. The cubic root of 65928431 is about 403.9778747319.

The spelling of 65928431 in words is "sixty-five million, nine hundred twenty-eight thousand, four hundred thirty-one".