1239081774420 has 384 divisors, whose sum is σ = 4154366361600. Its totient is φ = 269999516160.

The previous prime is 1239081774397. The next prime is 1239081774433. The reversal of 1239081774420 is 244771809321.

It is a self number, because there is not a number n which added to its sum of digits gives 1239081774420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 266868619 + ... + 266873261.

It is an arithmetic number, because the mean of its divisors is an integer number (10818662400).

Almost surely, 2^{1239081774420} is an apocalyptic number.

1239081774420 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 1239081774420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077183180800).

1239081774420 is an abundant number, since it is smaller than the sum of its proper divisors (2915284587180).

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

1239081774420 is a wasteful number, since it uses less digits than its factorization.

1239081774420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995 (or 4993 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 1239081774420 in words is "one trillion, two hundred thirty-nine billion, eighty-one million, seven hundred seventy-four thousand, four hundred twenty".