40423998240 has 192 divisors, whose sum is σ = 141580897920. Its totient is φ = 10772352000.

The previous prime is 40423998239. The next prime is 40423998247. The reversal of 40423998240 is 4289932404.

It is a happy number.

40423998240 is a `hidden beast` number, since 404 + 239 + 9 + 8 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (40423998247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9722242 + ... + 9726398.

It is an arithmetic number, because the mean of its divisors is an integer number (737400510).

Almost surely, 2^40423998240 is an apocalyptic number.

40423998240 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 40423998240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70790448960).

40423998240 is an abundant number, since it is smaller than the sum of its proper divisors (101156899680).

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

40423998240 is a wasteful number, since it uses less digits than its factorization.

40423998240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432 (or 6418 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 40423998240 in words is "forty billion, four hundred twenty-three million, nine hundred ninety-eight thousand, two hundred forty".