1642704436 has 12 divisors (see below), whose sum is σ = 2999721312. Its totient is φ = 785641208.

The previous prime is 1642704403. The next prime is 1642704443. The reversal of 1642704436 is 6344072461.

It is a junction number, because it is equal to n+sod(n) for n = 1642704395 and 1642704404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8927650 + ... + 8927833.

It is an arithmetic number, because the mean of its divisors is an integer number (249976776).

Almost surely, 2^1642704436 is an apocalyptic number.

It is an amenable number.

1642704436 is a deficient number, since it is larger than the sum of its proper divisors (1357016876).

1642704436 is a wasteful number, since it uses less digits than its factorization.

1642704436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855510 (or 17855508 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 1642704436 is about 40530.2903517850. The cubic root of 1642704436 is about 1179.9215776667.

Adding to 1642704436 its reverse (6344072461), we get a palindrome (7986776897).

The spelling of 1642704436 in words is "one billion, six hundred forty-two million, seven hundred four thousand, four hundred thirty-six".