1642290938 has 8 divisors (see below), whose sum is σ = 2548382580. Its totient is φ = 792830080.

The previous prime is 1642290931. The next prime is 1642290943. The reversal of 1642290938 is 8390922461.

It can be written as a sum of positive squares in 2 ways, for example, as 1626266929 + 16024009 = 40327^2 + 4003^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1642290931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14157623 + ... + 14157738.

Almost surely, 2^1642290938 is an apocalyptic number.

1642290938 is a deficient number, since it is larger than the sum of its proper divisors (906091642).

1642290938 is a wasteful number, since it uses less digits than its factorization.

1642290938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28315392.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1642290938 is about 40525.1889323171. The cubic root of 1642290938 is about 1179.8225669246.

The spelling of 1642290938 in words is "one billion, six hundred forty-two million, two hundred ninety thousand, nine hundred thirty-eight".