1163964438 has 64 divisors (see below), whose sum is σ = 3183505920. Its totient is φ = 306978336.

The previous prime is 1163964407. The next prime is 1163964469. The reversal of 1163964438 is 8344693611.

1163964438 is a `hidden beast` number, since 1 + 1 + 639 + 6 + 4 + 4 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1163964407) and next prime (1163964469).

It is a junction number, because it is equal to n+sod(n) for n = 1163964393 and 1163964402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113520 + ... + 123347.

It is an arithmetic number, because the mean of its divisors is an integer number (49742280).

Almost surely, 2^1163964438 is an apocalyptic number.

1163964438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1163964438 is an abundant number, since it is smaller than the sum of its proper divisors (2019541482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1163964438 is a wasteful number, since it uses less digits than its factorization.

1163964438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236898 (or 236892 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 1163964438 is about 34116.9230441434. The cubic root of 1163964438 is about 1051.9131975732.

The spelling of 1163964438 in words is "one billion, one hundred sixty-three million, nine hundred sixty-four thousand, four hundred thirty-eight".