78722616 has 128 divisors (see below), whose sum is σ = 234432000. Its totient is φ = 22014720.

The previous prime is 78722573. The next prime is 78722621. The reversal of 78722616 is 61622787.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600871 + ... + 601001.

It is an arithmetic number, because the mean of its divisors is an integer number (1831500).

Almost surely, 2^78722616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78722616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117216000).

78722616 is an abundant number, since it is smaller than the sum of its proper divisors (155709384).

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

78722616 is a wasteful number, since it uses less digits than its factorization.

78722616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 216 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 78722616 is about 8872.5766268880. The cubic root of 78722616 is about 428.5812552667.

The spelling of 78722616 in words is "seventy-eight million, seven hundred twenty-two thousand, six hundred sixteen".