40345132440 has 32 divisors (see below), whose sum is σ = 121035397680. Its totient is φ = 10758701952.

The previous prime is 40345132423. The next prime is 40345132453. The reversal of 40345132440 is 4423154304.

It is a super-2 number, since 2×40345132440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 40345132398 and 40345132407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168104599 + ... + 168104838.

Almost surely, 2^40345132440 is an apocalyptic number.

40345132440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40345132440 is an abundant number, since it is smaller than the sum of its proper divisors (80690265240).

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

40345132440 is a wasteful number, since it uses less digits than its factorization.

40345132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336209451 (or 336209447 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 40345132440 its reverse (4423154304), we get a palindrome (44768286744).

The spelling of 40345132440 in words is "forty billion, three hundred forty-five million, one hundred thirty-two thousand, four hundred forty".