1163640 has 32 divisors (see below), whose sum is σ = 3491280. Its totient is φ = 310272.

The previous prime is 1163629. The next prime is 1163641. The reversal of 1163640 is 463611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4729 + ... + 4968.

2^1163640 is an apocalyptic number.

1163640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163640 is an abundant number, since it is smaller than the sum of its proper divisors (2327640).

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

1163640 is a wasteful number, since it uses less digits than its factorization.

1163640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9711 (or 9707 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1163640 is about 1078.7214654395. The cubic root of 1163640 is about 105.1815453371.

The spelling of 1163640 in words is "one million, one hundred sixty-three thousand, six hundred forty".