1642431404 has 24 divisors (see below), whose sum is σ = 3044653920. Its totient is φ = 772572416.

The previous prime is 1642431377. The next prime is 1642431407. The reversal of 1642431404 is 4041342461.

It is a super-2 number, since 2×1642431404² = 5395161833690822432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1642431407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226889 + ... + 234015.

It is an arithmetic number, because the mean of its divisors is an integer number (126860580).

Almost surely, 2^1642431404 is an apocalyptic number.

It is an amenable number.

1642431404 is a deficient number, since it is larger than the sum of its proper divisors (1402222516).

1642431404 is a wasteful number, since it uses less digits than its factorization.

1642431404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10537 (or 10535 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1642431404 is about 40526.9219655281. The cubic root of 1642431404 is about 1179.8562029121.

Adding to 1642431404 its reverse (4041342461), we get a palindrome (5683773865).

The spelling of 1642431404 in words is "one billion, six hundred forty-two million, four hundred thirty-one thousand, four hundred four".