15890814940 has 192 divisors, whose sum is σ = 47442060288. Its totient is φ = 4302950400.

The previous prime is 15890814917. The next prime is 15890814949. The reversal of 15890814940 is 4941809851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15890814949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 316995 + ... + 363685.

It is an arithmetic number, because the mean of its divisors is an integer number (247094064).

Almost surely, 2^15890814940 is an apocalyptic number.

15890814940 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 15890814940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23721030144).

15890814940 is an abundant number, since it is smaller than the sum of its proper divisors (31551245348).

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

15890814940 is a wasteful number, since it uses less digits than its factorization.

15890814940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46748 (or 46746 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 15890814940 in words is "fifteen billion, eight hundred ninety million, eight hundred fourteen thousand, nine hundred forty".