40123220320 has 192 divisors, whose sum is σ = 101964635136. Its totient is φ = 14880983040.

The previous prime is 40123220311. The next prime is 40123220339. The reversal of 40123220320 is 2302232104.

It is a congruent number.

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, 63586405 + ... + 63587035.

It is an arithmetic number, because the mean of its divisors is an integer number (531065808).

Almost surely, 2^40123220320 is an apocalyptic number.

40123220320 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 40123220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50982317568).

40123220320 is an abundant number, since it is smaller than the sum of its proper divisors (61841414816).

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

40123220320 is a wasteful number, since it uses less digits than its factorization.

40123220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 40123220320 its reverse (2302232104), we get a palindrome (42425452424).

The spelling of 40123220320 in words is "forty billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twenty".