40421001040 has 80 divisors (see below), whose sum is σ = 109902215808. Its totient is φ = 13536327168.

The previous prime is 40421001007. The next prime is 40421001077. The reversal of 40421001040 is 4010012404.

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 (16).

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, 815227 + ... + 863386.

Almost surely, 2^40421001040 is an apocalyptic number.

40421001040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40421001040 is an abundant number, since it is smaller than the sum of its proper divisors (69481214768).

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

40421001040 is a wasteful number, since it uses less digits than its factorization.

40421001040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678676 (or 1678670 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 40421001040 its reverse (4010012404), we get a palindrome (44431013444).

The spelling of 40421001040 in words is "forty billion, four hundred twenty-one million, one thousand, forty".