787748210420 has 24 divisors (see below), whose sum is σ = 1654289265384. Its totient is φ = 315095851136.

The previous prime is 787748210371. The next prime is 787748210443. The reversal of 787748210420 is 24012847787.

It can be written as a sum of positive squares in 4 ways, for example, as 25091827216 + 762656383204 = 158404^2 + 873302^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2512202 + ... + 2808318.

It is an arithmetic number, because the mean of its divisors is an integer number (68928719391).

Almost surely, 2^787748210420 is an apocalyptic number.

It is an amenable number.

787748210420 is an abundant number, since it is smaller than the sum of its proper divisors (866541054964).

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

787748210420 is a wasteful number, since it uses less digits than its factorization.

787748210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429139 (or 429137 counting only the distinct ones).

The product of its (nonzero) digits is 1404928, while the sum is 50.

The spelling of 787748210420 in words is "seven hundred eighty-seven billion, seven hundred forty-eight million, two hundred ten thousand, four hundred twenty".