17949040 has 20 divisors (see below), whose sum is σ = 41731704. Its totient is φ = 7179584.

The previous prime is 17949023. The next prime is 17949049. The reversal of 17949040 is 4094971.

17949040 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 17948987 and 17949005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17949049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112102 + ... + 112261.

Almost surely, 2^17949040 is an apocalyptic number.

17949040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17949040 is an abundant number, since it is smaller than the sum of its proper divisors (23782664).

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

17949040 is a wasteful number, since it uses less digits than its factorization.

17949040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224376 (or 224370 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 17949040 is about 4236.6307368002. The cubic root of 17949040 is about 261.8265853200.

The spelling of 17949040 in words is "seventeen million, nine hundred forty-nine thousand, forty".