31400432332440 has 128 divisors (see below), whose sum is σ = 94263109387200. Its totient is φ = 8367956142080.

The previous prime is 31400432332439. The next prime is 31400432332457. The reversal of 31400432332440 is 4423323400413.

It is a happy number.

It is a super-3 number, since 3×31400432332440³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1319944066 + ... + 1319967854.

Almost surely, 2^{31400432332440} is an apocalyptic number.

31400432332440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31400432332440 is an abundant number, since it is smaller than the sum of its proper divisors (62862677054760).

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

31400432332440 is a wasteful number, since it uses less digits than its factorization.

31400432332440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30557 (or 30553 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 31400432332440 its reverse (4423323400413), we get a palindrome (35823755732853).

The spelling of 31400432332440 in words is "thirty-one trillion, four hundred billion, four hundred thirty-two million, three hundred thirty-two thousand, four hundred forty".