1040639164 has 12 divisors (see below), whose sum is σ = 1821580488. Its totient is φ = 520187600.

The previous prime is 1040639147. The next prime is 1040639191. The reversal of 1040639164 is 4619360401.

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, 14047 + ... + 47734.

It is an arithmetic number, because the mean of its divisors is an integer number (151798374).

Almost surely, 2^1040639164 is an apocalyptic number.

It is an amenable number.

1040639164 is a deficient number, since it is larger than the sum of its proper divisors (780941324).

1040639164 is a wasteful number, since it uses less digits than its factorization.

1040639164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65996 (or 65994 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1040639164 is about 32258.9392882035. The cubic root of 1040639164 is about 1013.3669174099.

Adding to 1040639164 its reverse (4619360401), we get a palindrome (5659999565).

The spelling of 1040639164 in words is "one billion, forty million, six hundred thirty-nine thousand, one hundred sixty-four".