40140072420 has 192 divisors, whose sum is σ = 134813306880. Its totient is φ = 8724874752.

The previous prime is 40140072403. The next prime is 40140072433. The reversal of 40140072420 is 2427004104.

It is a super-2 number, since 2×40140072420² (a number of 22 digits) contains 22 as substring.

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, 1659171 + ... + 1683189.

It is an arithmetic number, because the mean of its divisors is an integer number (702152640).

Almost surely, 2^40140072420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40140072420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67406653440).

40140072420 is an abundant number, since it is smaller than the sum of its proper divisors (94673234460).

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

40140072420 is a wasteful number, since it uses less digits than its factorization.

40140072420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24234 (or 24232 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

Adding to 40140072420 its reverse (2427004104), we get a palindrome (42567076524).

The spelling of 40140072420 in words is "forty billion, one hundred forty million, seventy-two thousand, four hundred twenty".