65243478 has 16 divisors (see below), whose sum is σ = 132060096. Its totient is φ = 21485640.

The previous prime is 65243471. The next prime is 65243489. The reversal of 65243478 is 87434256.

It is a happy number.

It is a super-2 number, since 2×65243478² = 8513422843072968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65243471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65008 + ... + 66003.

It is an arithmetic number, because the mean of its divisors is an integer number (8253756).

Almost surely, 2^65243478 is an apocalyptic number.

65243478 is an abundant number, since it is smaller than the sum of its proper divisors (66816618).

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

65243478 is a wasteful number, since it uses less digits than its factorization.

65243478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131099.

The product of its digits is 161280, while the sum is 39.

The square root of 65243478 is about 8077.3434989482. The cubic root of 65243478 is about 402.5739802032.

The spelling of 65243478 in words is "sixty-five million, two hundred forty-three thousand, four hundred seventy-eight".