1965434138 has 32 divisors (see below), whose sum is σ = 3193827840. Its totient is φ = 904055040.

The previous prime is 1965434129. The next prime is 1965434147. The reversal of 1965434138 is 8314345691.

It is an interprime number because it is at equal distance from previous prime (1965434129) and next prime (1965434147).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344606 + ... + 350262.

It is an arithmetic number, because the mean of its divisors is an integer number (99807120).

Almost surely, 2^1965434138 is an apocalyptic number.

1965434138 is a deficient number, since it is larger than the sum of its proper divisors (1228393702).

1965434138 is a wasteful number, since it uses less digits than its factorization.

1965434138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942.

The product of its digits is 311040, while the sum is 44.

The square root of 1965434138 is about 44333.2170950857. The cubic root of 1965434138 is about 1252.6204521855.

The spelling of 1965434138 in words is "one billion, nine hundred sixty-five million, four hundred thirty-four thousand, one hundred thirty-eight".