1117640 has 16 divisors (see below), whose sum is σ = 2514780. Its totient is φ = 447040.

The previous prime is 1117609. The next prime is 1117657. The reversal of 1117640 is 467111.

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 6724 = 1054^2 + 82^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13931 + ... + 14010.

2^1117640 is an apocalyptic number.

1117640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1117640 is an abundant number, since it is smaller than the sum of its proper divisors (1397140).

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

1117640 is a wasteful number, since it uses less digits than its factorization.

1117640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27952 (or 27948 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1117640 is about 1057.1849412473. The cubic root of 1117640 is about 103.7768885647.

The spelling of 1117640 in words is "one million, one hundred seventeen thousand, six hundred forty".