78240683 has 4 divisors (see below), whose sum is σ = 80764608. Its totient is φ = 75716760.

The previous prime is 78240677. The next prime is 78240703. The reversal of 78240683 is 38604287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38604287 = 1193 ⋅32359.

It is a cyclic number.

It is not a de Polignac number, because 78240683 - 2⁶ = 78240619 is a prime.

It is a super-2 number, since 2×78240683² = 12243208952612978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78248683) 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, 1261916 + ... + 1261977.

It is an arithmetic number, because the mean of its divisors is an integer number (20191152).

Almost surely, 2^78240683 is an apocalyptic number.

78240683 is a deficient number, since it is larger than the sum of its proper divisors (2523925).

78240683 is a wasteful number, since it uses less digits than its factorization.

78240683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523924.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 78240683 is about 8845.3763628237. The cubic root of 78240683 is about 427.7048854318.

The spelling of 78240683 in words is "seventy-eight million, two hundred forty thousand, six hundred eighty-three".