78239420910 has 256 divisors, whose sum is σ = 244064378880. Its totient is φ = 17463513600.

The previous prime is 78239420869. The next prime is 78239420933. The reversal of 78239420910 is 1902493287.

It is a super-2 number, since 2×78239420910² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 60137260 + ... + 60138560.

It is an arithmetic number, because the mean of its divisors is an integer number (953376480).

Almost surely, 2^78239420910 is an apocalyptic number.

78239420910 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78239420910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122032189440).

78239420910 is an abundant number, since it is smaller than the sum of its proper divisors (165824957970).

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

78239420910 is a wasteful number, since it uses less digits than its factorization.

78239420910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2042 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 78239420910 in words is "seventy-eight billion, two hundred thirty-nine million, four hundred twenty thousand, nine hundred ten".