782040427 has 4 divisors (see below), whose sum is σ = 893760496. Its totient is φ = 670320360.

The previous prime is 782040397. The next prime is 782040431. The reversal of 782040427 is 724040287.

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

It is a cyclic number.

It is not a de Polignac number, because 782040427 - 2⁷ = 782040299 is a prime.

It is a super-2 number, since 2×782040427² = 1223174458924684658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 782040392 and 782040401.

It is not an unprimeable number, because it can be changed into a prime (782070427) 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, 55860024 + ... + 55860037.

It is an arithmetic number, because the mean of its divisors is an integer number (223440124).

Almost surely, 2^782040427 is an apocalyptic number.

782040427 is a deficient number, since it is larger than the sum of its proper divisors (111720069).

782040427 is a wasteful number, since it uses less digits than its factorization.

782040427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111720068.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 782040427 is about 27964.9857321616. The cubic root of 782040427 is about 921.3183788161.

The spelling of 782040427 in words is "seven hundred eighty-two million, forty thousand, four hundred twenty-seven".