1020681396 has 144 divisors (see below), whose sum is σ = 3094291200. Its totient is φ = 277364736.

The previous prime is 1020681353. The next prime is 1020681407. The reversal of 1020681396 is 6931860201.

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 1020681396.

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 47 ways as a sum of consecutive naturals, for example, 1326900 + ... + 1327668.

Almost surely, 2^1020681396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020681396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547145600).

1020681396 is an abundant number, since it is smaller than the sum of its proper divisors (2073609804).

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

1020681396 is a wasteful number, since it uses less digits than its factorization.

1020681396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1020681396 is about 31948.1047325190. The cubic root of 1020681396 is about 1006.8468128305.

The spelling of 1020681396 in words is "one billion, twenty million, six hundred eighty-one thousand, three hundred ninety-six".