4018442640 has 80 divisors (see below), whose sum is σ = 12469344768. Its totient is φ = 1070537728.

The previous prime is 4018442599. The next prime is 4018442651. The reversal of 4018442640 is 462448104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4018442640² = 32295762501940339200, which contains 22 as substring.

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, 255649 + ... + 270911.

Almost surely, 2^4018442640 is an apocalyptic number.

4018442640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4018442640 is an abundant number, since it is smaller than the sum of its proper divisors (8450902128).

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

4018442640 is a wasteful number, since it uses less digits than its factorization.

4018442640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16376 (or 16370 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 4018442640 is about 63391.1874001426. The cubic root of 4018442640 is about 1589.8369675804.

The spelling of 4018442640 in words is "four billion, eighteen million, four hundred forty-two thousand, six hundred forty".