1965390828 has 24 divisors (see below), whose sum is σ = 4587167088. Its totient is φ = 654950976.

The previous prime is 1965390811. The next prime is 1965390857. The reversal of 1965390828 is 8280935691.

It is a happy number.

It is a super-2 number, since 2×1965390828² = 7725522213573051168, which contains 22 as substring.

It is an unprimeable number.

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, 27750 + ... + 68562.

It is an arithmetic number, because the mean of its divisors is an integer number (191131962).

Almost surely, 2^1965390828 is an apocalyptic number.

It is an amenable number.

1965390828 is an abundant number, since it is smaller than the sum of its proper divisors (2621776260).

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

1965390828 is a wasteful number, since it uses less digits than its factorization.

1965390828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44833 (or 44831 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 1965390828 is about 44332.7286324675. The cubic root of 1965390828 is about 1252.6112512683.

The spelling of 1965390828 in words is "one billion, nine hundred sixty-five million, three hundred ninety thousand, eight hundred twenty-eight".