78516284 has 48 divisors (see below), whose sum is σ = 180337920. Its totient is φ = 28978560.

The previous prime is 78516281. The next prime is 78516287. The reversal of 78516284 is 48261587.

It is an interprime number because it is at equal distance from previous prime (78516281) and next prime (78516287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78516281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857 + ... + 12560.

It is an arithmetic number, because the mean of its divisors is an integer number (3757040).

Almost surely, 2^78516284 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 78516284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90168960).

78516284 is an abundant number, since it is smaller than the sum of its proper divisors (101821636).

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

78516284 is a wasteful number, since it uses less digits than its factorization.

78516284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13458 (or 13456 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 78516284 is about 8860.9414849665. The cubic root of 78516284 is about 428.2064904570.

The spelling of 78516284 in words is "seventy-eight million, five hundred sixteen thousand, two hundred eighty-four".