78949312 has 56 divisors (see below), whose sum is σ = 174215552. Its totient is φ = 35251200.

The previous prime is 78949307. The next prime is 78949337. The reversal of 78949312 is 21394987.

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, 24262 + ... + 27322.

It is an arithmetic number, because the mean of its divisors is an integer number (3110992).

Almost surely, 2^78949312 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 78949312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87107776).

78949312 is an abundant number, since it is smaller than the sum of its proper divisors (95266240).

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

78949312 is a wasteful number, since it uses less digits than its factorization.

78949312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3107 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 78949312 is about 8885.3425370100. The cubic root of 78949312 is about 428.9922533978.

The spelling of 78949312 in words is "seventy-eight million, nine hundred forty-nine thousand, three hundred twelve".