78936434 has 8 divisors (see below), whose sum is σ = 122487660. Its totient is φ = 38107216.

The previous prime is 78936427. The next prime is 78936461. The reversal of 78936434 is 43463987.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 2111209 = 8765^2 + 1453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78936434² = 12461921225272712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680429 + ... + 680544.

Almost surely, 2^78936434 is an apocalyptic number.

78936434 is a deficient number, since it is larger than the sum of its proper divisors (43551226).

78936434 is a wasteful number, since it uses less digits than its factorization.

78936434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361004.

The product of its digits is 435456, while the sum is 44.

The square root of 78936434 is about 8884.6178308355. The cubic root of 78936434 is about 428.9689267742.

The spelling of 78936434 in words is "seventy-eight million, nine hundred thirty-six thousand, four hundred thirty-four".