78705340 has 24 divisors (see below), whose sum is σ = 188893152. Its totient is φ = 26984640.

The previous prime is 78705337. The next prime is 78705349. The reversal of 78705340 is 4350787.

It is a junction number, because it is equal to n+sod(n) for n = 78705296 and 78705305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78705349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280951 + ... + 281230.

It is an arithmetic number, because the mean of its divisors is an integer number (7870548).

Almost surely, 2^78705340 is an apocalyptic number.

78705340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78705340 is an abundant number, since it is smaller than the sum of its proper divisors (110187812).

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

78705340 is a wasteful number, since it uses less digits than its factorization.

78705340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562197 (or 562195 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 78705340 is about 8871.6030118576. The cubic root of 78705340 is about 428.5499016701.

The spelling of 78705340 in words is "seventy-eight million, seven hundred five thousand, three hundred forty".