1020209976 has 48 divisors (see below), whose sum is σ = 2771847000. Its totient is φ = 338989632.

The previous prime is 1020209941. The next prime is 1020209987. The reversal of 1020209976 is 6799020201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1020209976.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475 + ... + 45173.

Almost surely, 2^1020209976 is an apocalyptic number.

It is an amenable number.

1020209976 is an abundant number, since it is smaller than the sum of its proper divisors (1751637024).

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

1020209976 is a wasteful number, since it uses less digits than its factorization.

1020209976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45028 (or 45021 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1020209976 is about 31940.7259779736. The cubic root of 1020209976 is about 1006.6917788764.

The spelling of 1020209976 in words is "one billion, twenty million, two hundred nine thousand, nine hundred seventy-six".