78826464 has 72 divisors (see below), whose sum is σ = 225493632. Its totient is φ = 26119680.

The previous prime is 78826453. The next prime is 78826481. The reversal of 78826464 is 46462887.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×78826464² = 12427222853486592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54292 + ... + 55724.

It is an arithmetic number, because the mean of its divisors is an integer number (3131856).

Almost surely, 2^78826464 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 78826464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112746816).

78826464 is an abundant number, since it is smaller than the sum of its proper divisors (146667168).

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

78826464 is a wasteful number, since it uses less digits than its factorization.

78826464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640 (or 1629 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 78826464 is about 8878.4268876868. The cubic root of 78826464 is about 428.7696287058.

The spelling of 78826464 in words is "seventy-eight million, eight hundred twenty-six thousand, four hundred sixty-four".