1965544940 has 24 divisors (see below), whose sum is σ = 4131579312. Its totient is φ = 785468480.

The previous prime is 1965544937. The next prime is 1965544943. The reversal of 1965544940 is 494455691.

It is an interprime number because it is at equal distance from previous prime (1965544937) and next prime (1965544943).

It is a super-2 number, since 2×1965544940² = 7726733822319207200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1965544943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25094 + ... + 67533.

It is an arithmetic number, because the mean of its divisors is an integer number (172149138).

Almost surely, 2^1965544940 is an apocalyptic number.

1965544940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1965544940 is an abundant number, since it is smaller than the sum of its proper divisors (2166034372).

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

1965544940 is a wasteful number, since it uses less digits than its factorization.

1965544940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93697 (or 93695 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 1965544940 is about 44334.4667273669. The cubic root of 1965544940 is about 1252.6439907074.

The spelling of 1965544940 in words is "one billion, nine hundred sixty-five million, five hundred forty-four thousand, nine hundred forty".