17942040 has 128 divisors (see below), whose sum is σ = 61560000. Its totient is φ = 4644864.

The previous prime is 17942017. The next prime is 17942053. The reversal of 17942040 is 4024971.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 17941995 and 17942013.

It is a congruent number.

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, 39736 + ... + 40184.

Almost surely, 2^17942040 is an apocalyptic number.

17942040 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 17942040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30780000).

17942040 is an abundant number, since it is smaller than the sum of its proper divisors (43617960).

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

17942040 is a wasteful number, since it uses less digits than its factorization.

17942040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 17942040 is about 4235.8045280678. The cubic root of 17942040 is about 261.7925440489.

The spelling of 17942040 in words is "seventeen million, nine hundred forty-two thousand, forty".