1099331440 has 40 divisors (see below), whose sum is σ = 2557568448. Its totient is φ = 439453440.

The previous prime is 1099331423. The next prime is 1099331473. The reversal of 1099331440 is 441339901.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1099331440² = 2417059229944947200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1099331396 and 1099331405.

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, 161710 + ... + 168370.

Almost surely, 2^1099331440 is an apocalyptic number.

1099331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099331440 is an abundant number, since it is smaller than the sum of its proper divisors (1458237008).

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

1099331440 is a wasteful number, since it uses less digits than its factorization.

1099331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8737 (or 8731 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1099331440 is about 33156.1674504156. The cubic root of 1099331440 is about 1032.0709393777.

The spelling of 1099331440 in words is "one billion, ninety-nine million, three hundred thirty-one thousand, four hundred forty".