118971640 has 64 divisors (see below), whose sum is σ = 282657600. Its totient is φ = 44977152.

The previous prime is 118971631. The next prime is 118971667. The reversal of 118971640 is 46179811.

It is a super-2 number, since 2×118971640² = 28308502248579200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 118971640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81154 + ... + 82606.

It is an arithmetic number, because the mean of its divisors is an integer number (4416525).

Almost surely, 2^118971640 is an apocalyptic number.

118971640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118971640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141328800).

118971640 is an abundant number, since it is smaller than the sum of its proper divisors (163685960).

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

118971640 is a wasteful number, since it uses less digits than its factorization.

118971640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 118971640 is about 10907.4121587112. The cubic root of 118971640 is about 491.8293964201.

The spelling of 118971640 in words is "one hundred eighteen million, nine hundred seventy-one thousand, six hundred forty".