31023748840 has 64 divisors (see below), whose sum is σ = 79966051200. Its totient is φ = 10611287808.

The previous prime is 31023748829. The next prime is 31023748879. The reversal of 31023748840 is 4884732013.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 31023748793 and 31023748802.

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, 14899 + ... + 249538.

It is an arithmetic number, because the mean of its divisors is an integer number (1249469550).

Almost surely, 2^31023748840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023748840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39983025600).

31023748840 is an abundant number, since it is smaller than the sum of its proper divisors (48942302360).

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

31023748840 is a wasteful number, since it uses less digits than its factorization.

31023748840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264874 (or 264870 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 31023748840 in words is "thirty-one billion, twenty-three million, seven hundred forty-eight thousand, eight hundred forty".