31434142440 has 64 divisors (see below), whose sum is σ = 94725388800. Its totient is φ = 8344841472.

The previous prime is 31434142367. The next prime is 31434142459. The reversal of 31434142440 is 4424143413.

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 = 31434142398 and 31434142407.

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, 560575 + ... + 614094.

It is an arithmetic number, because the mean of its divisors is an integer number (1480084200).

Almost surely, 2^31434142440 is an apocalyptic number.

31434142440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31434142440 is an abundant number, since it is smaller than the sum of its proper divisors (63291246360).

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

31434142440 is a wasteful number, since it uses less digits than its factorization.

31434142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174906 (or 1174902 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 31434142440 its reverse (4424143413), we get a palindrome (35858285853).

The spelling of 31434142440 in words is "thirty-one billion, four hundred thirty-four million, one hundred forty-two thousand, four hundred forty".