1165434478 has 24 divisors (see below), whose sum is σ = 1895183136. Its totient is φ = 537264000.

The previous prime is 1165434451. The next prime is 1165434481. The reversal of 1165434478 is 8744345611.

It is a super-2 number, since 2×1165434478² = 2716475045022264968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414678 + ... + 417478.

It is an arithmetic number, because the mean of its divisors is an integer number (78965964).

Almost surely, 2^1165434478 is an apocalyptic number.

1165434478 is a deficient number, since it is larger than the sum of its proper divisors (729748658).

1165434478 is a wasteful number, since it uses less digits than its factorization.

1165434478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060 (or 4047 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 1165434478 is about 34138.4603929351. The cubic root of 1165434478 is about 1052.3558525458.

The spelling of 1165434478 in words is "one billion, one hundred sixty-five million, four hundred thirty-four thousand, four hundred seventy-eight".