1099686040 has 32 divisors (see below), whose sum is σ = 2514861360. Its totient is φ = 432662400.

The previous prime is 1099686037. The next prime is 1099686053. The reversal of 1099686040 is 406869901.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 222906 + ... + 227785.

Almost surely, 2^1099686040 is an apocalyptic number.

1099686040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099686040 is an abundant number, since it is smaller than the sum of its proper divisors (1415175320).

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

1099686040 is a wasteful number, since it uses less digits than its factorization.

1099686040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450763 (or 450759 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1099686040 is about 33161.5144406886. The cubic root of 1099686040 is about 1032.1818956066.

The spelling of 1099686040 in words is "one billion, ninety-nine million, six hundred eighty-six thousand, forty".