1965438530 has 16 divisors (see below), whose sum is σ = 3859406784. Its totient is φ = 714704880.

The previous prime is 1965438523. The next prime is 1965438577. The reversal of 1965438530 is 358345691.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8933702 + ... + 8933921.

It is an arithmetic number, because the mean of its divisors is an integer number (241212924).

Almost surely, 2^1965438530 is an apocalyptic number.

1965438530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1965438530 is a deficient number, since it is larger than the sum of its proper divisors (1893968254).

1965438530 is a wasteful number, since it uses less digits than its factorization.

1965438530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17867641.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1965438530 is about 44333.2666290225. The cubic root of 1965438530 is about 1252.6213852288.

The spelling of 1965438530 in words is "one billion, nine hundred sixty-five million, four hundred thirty-eight thousand, five hundred thirty".