1640404414 has 16 divisors (see below), whose sum is σ = 2691915120. Its totient is φ = 743522560.

The previous prime is 1640404411. The next prime is 1640404433. The reversal of 1640404414 is 4144040461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640404411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97849 + ... + 113380.

It is an arithmetic number, because the mean of its divisors is an integer number (168244695).

Almost surely, 2^1640404414 is an apocalyptic number.

1640404414 is a deficient number, since it is larger than the sum of its proper divisors (1051510706).

1640404414 is a wasteful number, since it uses less digits than its factorization.

1640404414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211595.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 1640404414 is about 40501.9063008150. The cubic root of 1640404414 is about 1179.3706339293.

Adding to 1640404414 its reverse (4144040461), we get a palindrome (5784444875).

The spelling of 1640404414 in words is "one billion, six hundred forty million, four hundred four thousand, four hundred fourteen".