1965798 has 12 divisors (see below), whose sum is σ = 4259268. Its totient is φ = 655260.

The previous prime is 1965781. The next prime is 1965851. The reversal of 1965798 is 8975691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54588 + ... + 54623.

It is an arithmetic number, because the mean of its divisors is an integer number (354939).

2^1965798 is an apocalyptic number.

1965798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1965798 is an abundant number, since it is smaller than the sum of its proper divisors (2293470).

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

1965798 is a wasteful number, since it uses less digits than its factorization.

1965798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109219 (or 109216 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1965798 is about 1402.0691851688. The cubic root of 1965798 is about 125.2697746874.

The spelling of 1965798 in words is "one million, nine hundred sixty-five thousand, seven hundred ninety-eight".