65278434 has 32 divisors (see below), whose sum is σ = 144406080. Its totient is φ = 19541952.

The previous prime is 65278427. The next prime is 65278459. The reversal of 65278434 is 43487256.

It is a happy number.

It is a super-2 number, since 2×65278434² = 8522547890984712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 65278392 and 65278401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8424 + ... + 14195.

It is an arithmetic number, because the mean of its divisors is an integer number (4512690).

Almost surely, 2^65278434 is an apocalyptic number.

65278434 is an abundant number, since it is smaller than the sum of its proper divisors (79127646).

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

65278434 is a wasteful number, since it uses less digits than its factorization.

65278434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22674.

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

The square root of 65278434 is about 8079.5070394177. The cubic root of 65278434 is about 402.6458640860.

The spelling of 65278434 in words is "sixty-five million, two hundred seventy-eight thousand, four hundred thirty-four".