11398142940 has 96 divisors (see below), whose sum is σ = 33653733120. Its totient is φ = 2874456576.

The previous prime is 11398142911. The next prime is 11398142981. The reversal of 11398142940 is 4924189311.

It is a junction number, because it is equal to n+sod(n) for n = 11398142892 and 11398142901.

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, 660664 + ... + 677696.

It is an arithmetic number, because the mean of its divisors is an integer number (350559720).

Almost surely, 2^11398142940 is an apocalyptic number.

11398142940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11398142940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16826866560).

11398142940 is an abundant number, since it is smaller than the sum of its proper divisors (22255590180).

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

11398142940 is a wasteful number, since it uses less digits than its factorization.

11398142940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17651 (or 17649 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 11398142940 in words is "eleven billion, three hundred ninety-eight million, one hundred forty-two thousand, nine hundred forty".