31440230040 has 64 divisors (see below), whose sum is σ = 94341024000. Its totient is φ = 8382253952.

The previous prime is 31440230033. The next prime is 31440230047. The reversal of 31440230040 is 4003204413.

It is an interprime number because it is at equal distance from previous prime (31440230033) and next prime (31440230047).

It is a junction number, because it is equal to n+sod(n) for n = 31440229989 and 31440230016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440230047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586189 + ... + 637571.

It is an arithmetic number, because the mean of its divisors is an integer number (1474078500).

Almost surely, 2^31440230040 is an apocalyptic number.

31440230040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31440230040 is an abundant number, since it is smaller than the sum of its proper divisors (62900793960).

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

31440230040 is a wasteful number, since it uses less digits than its factorization.

31440230040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56496 (or 56492 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 31440230040 its reverse (4003204413), we get a palindrome (35443434453).

The spelling of 31440230040 in words is "thirty-one billion, four hundred forty million, two hundred thirty thousand, forty".