4000003440 has 80 divisors (see below), whose sum is σ = 13129436448. Its totient is φ = 1003921408.

The previous prime is 4000003421. The next prime is 4000003459. The reversal of 4000003440 is 443000004.

It is an interprime number because it is at equal distance from previous prime (4000003421) and next prime (4000003459).

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 486117 + ... + 494276.

Almost surely, 2^4000003440 is an apocalyptic number.

4000003440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000003440 is an abundant number, since it is smaller than the sum of its proper divisors (9129433008).

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

4000003440 is a wasteful number, since it uses less digits than its factorization.

4000003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980426 (or 980420 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4000003440 is about 63245.5803989496. The cubic root of 4000003440 is about 1587.4015070230.

Adding to 4000003440 its reverse (443000004), we get a palindrome (4443003444).

The spelling of 4000003440 in words is "four billion, three thousand, four hundred forty".