13865890440 has 32 divisors (see below), whose sum is σ = 41597671680. Its totient is φ = 3697570752.

The previous prime is 13865890429. The next prime is 13865890453. The reversal of 13865890440 is 4409856831.

It is a self number, because there is not a number n which added to its sum of digits gives 13865890440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57774424 + ... + 57774663.

It is an arithmetic number, because the mean of its divisors is an integer number (1299927240).

Almost surely, 2^13865890440 is an apocalyptic number.

13865890440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13865890440 is an abundant number, since it is smaller than the sum of its proper divisors (27731781240).

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

13865890440 is a wasteful number, since it uses less digits than its factorization.

13865890440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115549101 (or 115549097 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 13865890440 in words is "thirteen billion, eight hundred sixty-five million, eight hundred ninety thousand, four hundred forty".