1071865780 has 24 divisors (see below), whose sum is σ = 2348785152. Its totient is φ = 410104992.

The previous prime is 1071865741. The next prime is 1071865807. The reversal of 1071865780 is 875681701.

It is a super-2 number, since 2×1071865780² = 2297792500670016800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164612 + ... + 1165531.

It is an arithmetic number, because the mean of its divisors is an integer number (97866048).

Almost surely, 2^1071865780 is an apocalyptic number.

1071865780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1071865780 is an abundant number, since it is smaller than the sum of its proper divisors (1276919372).

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

1071865780 is a wasteful number, since it uses less digits than its factorization.

1071865780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330175 (or 2330173 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 43.

The square root of 1071865780 is about 32739.3613254749. The cubic root of 1071865780 is about 1023.4032740049.

The spelling of 1071865780 in words is "one billion, seventy-one million, eight hundred sixty-five thousand, seven hundred eighty".