16294389840 has 320 divisors, whose sum is σ = 59617969920. Its totient is φ = 4076421120.

The previous prime is 16294389817. The next prime is 16294389851. The reversal of 16294389840 is 4898349261.

16294389840 is a `hidden beast` number, since 1 + 629 + 4 + 3 + 8 + 9 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16780555 + ... + 16781525.

It is an arithmetic number, because the mean of its divisors is an integer number (186306156).

Almost surely, 2^16294389840 is an apocalyptic number.

16294389840 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 16294389840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29808984960).

16294389840 is an abundant number, since it is smaller than the sum of its proper divisors (43323580080).

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

16294389840 is a wasteful number, since it uses less digits than its factorization.

16294389840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 16294389840 in words is "sixteen billion, two hundred ninety-four million, three hundred eighty-nine thousand, eight hundred forty".