1083653640 has 96 divisors (see below), whose sum is σ = 3652346880. Its totient is φ = 288971712.

The previous prime is 1083653629. The next prime is 1083653651. The reversal of 1083653640 is 463563801.

1083653640 is a `hidden beast` number, since 1 + 0 + 8 + 3 + 6 + 5 + 3 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (1083653629) and next prime (1083653651).

It is a super-2 number, since 2×1083653640² = 2348610422970499200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1083653595 and 1083653604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46024 + ... + 65463.

It is an arithmetic number, because the mean of its divisors is an integer number (38045280).

Almost surely, 2^1083653640 is an apocalyptic number.

1083653640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1083653640 is an abundant number, since it is smaller than the sum of its proper divisors (2568693240).

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

1083653640 is a wasteful number, since it uses less digits than its factorization.

1083653640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111513 (or 111497 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1083653640 is about 32918.8948781699. The cubic root of 1083653640 is about 1027.1412355019.

The spelling of 1083653640 in words is "one billion, eighty-three million, six hundred fifty-three thousand, six hundred forty".