1642406469 has 8 divisors (see below), whose sum is σ = 2388954912. Its totient is φ = 995397840.

The previous prime is 1642406461. The next prime is 1642406483. The reversal of 1642406469 is 9646042461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1642406469 - 2³ = 1642406461 is a prime.

It is a super-2 number, since 2×1642406469² = 5394998018826095922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1642406469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642406461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24884914 + ... + 24884979.

It is an arithmetic number, because the mean of its divisors is an integer number (298619364).

Almost surely, 2^1642406469 is an apocalyptic number.

It is an amenable number.

1642406469 is a deficient number, since it is larger than the sum of its proper divisors (746548443).

1642406469 is a wasteful number, since it uses less digits than its factorization.

1642406469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49769907.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 1642406469 is about 40526.6143293515. The cubic root of 1642406469 is about 1179.8502321171.

The spelling of 1642406469 in words is "one billion, six hundred forty-two million, four hundred six thousand, four hundred sixty-nine".