40000001042440 has 128 divisors (see below), whose sum is σ = 95868857664000. Its totient is φ = 14977013280768.

The previous prime is 40000001042437. The next prime is 40000001042467. The reversal of 40000001042440 is 4424010000004.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 96043932 + ... + 96459508.

It is an arithmetic number, because the mean of its divisors is an integer number (748975450500).

Almost surely, 2^{40000001042440} is an apocalyptic number.

40000001042440 is a gapful number since it is divisible by the number (40) 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 40000001042440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47934428832000).

40000001042440 is an abundant number, since it is smaller than the sum of its proper divisors (55868856621560).

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

40000001042440 is a wasteful number, since it uses less digits than its factorization.

40000001042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417119 (or 417115 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 40000001042440 its reverse (4424010000004), we get a palindrome (44424011042444).

The spelling of 40000001042440 in words is "forty trillion, one million, forty-two thousand, four hundred forty".