40015122440 has 16 divisors (see below), whose sum is σ = 90034025580. Its totient is φ = 16006048960.

The previous prime is 40015122439. The next prime is 40015122491. The reversal of 40015122440 is 4422151004.

It can be written as a sum of positive squares in 2 ways, for example, as 37799914084 + 2215208356 = 194422^2 + 47066^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500188991 + ... + 500189070.

Almost surely, 2^40015122440 is an apocalyptic number.

40015122440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40015122440 is an abundant number, since it is smaller than the sum of its proper divisors (50018903140).

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

40015122440 is a wasteful number, since it uses less digits than its factorization.

40015122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000378072 (or 1000378068 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 40015122440 its reverse (4422151004), we get a palindrome (44437273444).

The spelling of 40015122440 in words is "forty billion, fifteen million, one hundred twenty-two thousand, four hundred forty".