40404322640 has 320 divisors, whose sum is σ = 110833477632. Its totient is φ = 13548902400.

The previous prime is 40404322639. The next prime is 40404322661. The reversal of 40404322640 is 4622340404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 122067275 + ... + 122067605.

Almost surely, 2^40404322640 is an apocalyptic number.

40404322640 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 40404322640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55416738816).

40404322640 is an abundant number, since it is smaller than the sum of its proper divisors (70429154992).

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

40404322640 is a wasteful number, since it uses less digits than its factorization.

40404322640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The spelling of 40404322640 in words is "forty billion, four hundred four million, three hundred twenty-two thousand, six hundred forty".