784401434 has 16 divisors (see below), whose sum is σ = 1242773280. Its totient is φ = 370285200.

The previous prime is 784401433. The next prime is 784401473. The reversal of 784401434 is 434104487.

It is a super-2 number, since 2×784401434² = 1230571219322512712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 784401394 and 784401403.

It is not an unprimeable number, because it can be changed into a prime (784401433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24092 + ... + 46359.

It is an arithmetic number, because the mean of its divisors is an integer number (77673330).

Almost surely, 2^784401434 is an apocalyptic number.

784401434 is a deficient number, since it is larger than the sum of its proper divisors (458371846).

784401434 is a wasteful number, since it uses less digits than its factorization.

784401434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70765.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 784401434 is about 28007.1675468977. The cubic root of 784401434 is about 922.2446113100.

The spelling of 784401434 in words is "seven hundred eighty-four million, four hundred one thousand, four hundred thirty-four".