1166400440 has 32 divisors (see below), whose sum is σ = 2626879680. Its totient is φ = 466119552.

The previous prime is 1166400439. The next prime is 1166400461. The reversal of 1166400440 is 440046611.

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, 30902 + ... + 57338.

It is an arithmetic number, because the mean of its divisors is an integer number (82089990).

Almost surely, 2^1166400440 is an apocalyptic number.

1166400440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166400440 is an abundant number, since it is smaller than the sum of its proper divisors (1460479240).

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

1166400440 is a wasteful number, since it uses less digits than its factorization.

1166400440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27551 (or 27547 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1166400440 is about 34152.6051714946. The cubic root of 1166400440 is about 1052.6465181196.

The spelling of 1166400440 in words is "one billion, one hundred sixty-six million, four hundred thousand, four hundred forty".