40423240320 has 128 divisors (see below), whose sum is σ = 128905560000. Its totient is φ = 10774806528.

The previous prime is 40423240309. The next prime is 40423240349. The reversal of 40423240320 is 2304232404.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 7925131 + ... + 7930229.

Almost surely, 2^40423240320 is an apocalyptic number.

40423240320 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 40423240320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64452780000).

40423240320 is an abundant number, since it is smaller than the sum of its proper divisors (88482319680).

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

40423240320 is a wasteful number, since it uses less digits than its factorization.

40423240320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250 (or 9238 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 40423240320 its reverse (2304232404), we get a palindrome (42727472724).

The spelling of 40423240320 in words is "forty billion, four hundred twenty-three million, two hundred forty thousand, three hundred twenty".