17996040 has 128 divisors (see below), whose sum is σ = 63216000. Its totient is φ = 4541184.

The previous prime is 17995997. The next prime is 17996063. The reversal of 17996040 is 4069971.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 17995986 and 17996004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20082 + ... + 20958.

It is an arithmetic number, because the mean of its divisors is an integer number (493875).

Almost surely, 2^17996040 is an apocalyptic number.

17996040 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 17996040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31608000).

17996040 is an abundant number, since it is smaller than the sum of its proper divisors (45219960).

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

17996040 is a wasteful number, since it uses less digits than its factorization.

17996040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 17996040 is about 4242.1739709729. The cubic root of 17996040 is about 262.0549192411.

The spelling of 17996040 in words is "seventeen million, nine hundred ninety-six thousand, forty".