1083400812 has 48 divisors (see below), whose sum is σ = 3024883680. Its totient is φ = 333353664.

The previous prime is 1083400783. The next prime is 1083400817. The reversal of 1083400812 is 2180043801.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1083400817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384423 + ... + 387230.

It is an arithmetic number, because the mean of its divisors is an integer number (63018410).

Almost surely, 2^1083400812 is an apocalyptic number.

1083400812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1083400812 is an abundant number, since it is smaller than the sum of its proper divisors (1941482868).

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

1083400812 is a wasteful number, since it uses less digits than its factorization.

1083400812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771679 (or 771671 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1083400812 is about 32915.0544887898. The cubic root of 1083400812 is about 1027.0613482718.

The spelling of 1083400812 in words is "one billion, eighty-three million, four hundred thousand, eight hundred twelve".