40240242440 has 64 divisors (see below), whose sum is σ = 93075231600. Its totient is φ = 15646307328.

The previous prime is 40240242431. The next prime is 40240242451. The reversal of 40240242440 is 4424204204.

It can be written as a sum of positive squares in 8 ways, for example, as 7996294084 + 32243948356 = 89422^2 + 179566^2 .

It is a super-2 number, since 2×40240242440² (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 15 ways as a sum of consecutive naturals, for example, 1629062 + ... + 1653578.

Almost surely, 2^40240242440 is an apocalyptic number.

40240242440 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 40240242440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46537615800).

40240242440 is an abundant number, since it is smaller than the sum of its proper divisors (52834989160).

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

40240242440 is a wasteful number, since it uses less digits than its factorization.

40240242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25674 (or 25670 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 40240242440 its reverse (4424204204), we get a palindrome (44664446644).

The spelling of 40240242440 in words is "forty billion, two hundred forty million, two hundred forty-two thousand, four hundred forty".