787426238790 has 80 divisors (see below), whose sum is σ = 2119768382160. Its totient is φ = 209735697600.

The previous prime is 787426238777. The next prime is 787426238791. The reversal of 787426238790 is 97832624787.

787426238790 is a `hidden beast` number, since 78 + 7 + 42 + 62 + 387 + 90 = 666.

It is a super-2 number, since 2×787426238790² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787426238791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 129940 + ... + 1261640.

It is an arithmetic number, because the mean of its divisors is an integer number (26497104777).

Almost surely, 2^787426238790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 787426238790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059884191080).

787426238790 is an abundant number, since it is smaller than the sum of its proper divisors (1332342143370).

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

787426238790 is a wasteful number, since it uses less digits than its factorization.

787426238790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132579 (or 1132570 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 63.

The spelling of 787426238790 in words is "seven hundred eighty-seven billion, four hundred twenty-six million, two hundred thirty-eight thousand, seven hundred ninety".