3402405991 has 4 divisors (see below), whose sum is σ = 3404220552. Its totient is φ = 3400591432.

The previous prime is 3402405871. The next prime is 3402405997. The reversal of 3402405991 is 1995042043.

3402405991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1995042043 = 1627 ⋅1226209.

It is a cyclic number.

It is not a de Polignac number, because 3402405991 - 2⁷ = 3402405863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3402405991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402405997) 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, 904465 + ... + 908218.

It is an arithmetic number, because the mean of its divisors is an integer number (851055138).

Almost surely, 2^3402405991 is an apocalyptic number.

3402405991 is a deficient number, since it is larger than the sum of its proper divisors (1814561).

3402405991 is a wasteful number, since it uses less digits than its factorization.

3402405991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814560.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 3402405991 is about 58330.1465024733. The cubic root of 3402405991 is about 1504.0492062648.

The spelling of 3402405991 in words is "three billion, four hundred two million, four hundred five thousand, nine hundred ninety-one".