16418840 has 32 divisors (see below), whose sum is σ = 38136960. Its totient is φ = 6355200.

The previous prime is 16418833. The next prime is 16418867. The reversal of 16418840 is 4881461.

It is a junction number, because it is equal to n+sod(n) for n = 16418797 and 16418806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5381 + ... + 7860.

It is an arithmetic number, because the mean of its divisors is an integer number (1191780).

Almost surely, 2^16418840 is an apocalyptic number.

16418840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16418840 is an abundant number, since it is smaller than the sum of its proper divisors (21718120).

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

16418840 is a wasteful number, since it uses less digits than its factorization.

16418840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13283 (or 13279 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 16418840 is about 4052.0167818014. The cubic root of 16418840 is about 254.1640703249.

The spelling of 16418840 in words is "sixteen million, four hundred eighteen thousand, eight hundred forty".