1965243420 has 144 divisors (see below), whose sum is σ = 6843852288. Its totient is φ = 447154560.

The previous prime is 1965243389. The next prime is 1965243431. The reversal of 1965243420 is 243425691.

It is a happy number.

1965243420 is a `hidden beast` number, since 1 + 96 + 524 + 3 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282585 + ... + 289455.

It is an arithmetic number, because the mean of its divisors is an integer number (47526752).

Almost surely, 2^1965243420 is an apocalyptic number.

1965243420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1965243420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3421926144).

1965243420 is an abundant number, since it is smaller than the sum of its proper divisors (4878608868).

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

1965243420 is a wasteful number, since it uses less digits than its factorization.

1965243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120 (or 7115 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1965243420 is about 44331.0660823761. The cubic root of 1965243420 is about 1252.5799344206.

The spelling of 1965243420 in words is "one billion, nine hundred sixty-five million, two hundred forty-three thousand, four hundred twenty".