3402430781 has 4 divisors (see below), whose sum is σ = 3404043132. Its totient is φ = 3400818432.

The previous prime is 3402430777. The next prime is 3402430789. The reversal of 3402430781 is 1870342043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1870342043 = 3371 ⋅554833.

It can be written as a sum of positive squares in 2 ways, for example, as 11115556 + 3391315225 = 3334^2 + 58235^2 .

It is a cyclic number.

It is not a de Polignac number, because 3402430781 - 2² = 3402430777 is a prime.

It is a super-2 number, since 2×3402430781² = 23153070438992539922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402430789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803006 + ... + 807231.

It is an arithmetic number, because the mean of its divisors is an integer number (851010783).

Almost surely, 2^3402430781 is an apocalyptic number.

It is an amenable number.

3402430781 is a deficient number, since it is larger than the sum of its proper divisors (1612351).

3402430781 is a wasteful number, since it uses less digits than its factorization.

3402430781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612350.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3402430781 is about 58330.3589994096. The cubic root of 3402430781 is about 1504.0528591005.

The spelling of 3402430781 in words is "three billion, four hundred two million, four hundred thirty thousand, seven hundred eighty-one".