78723726 has 32 divisors (see below), whose sum is σ = 166440960. Its totient is φ = 24754176.

The previous prime is 78723713. The next prime is 78723739. The reversal of 78723726 is 62732787.

It is an interprime number because it is at equal distance from previous prime (78723713) and next prime (78723739).

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 27955 + ... + 30641.

It is an arithmetic number, because the mean of its divisors is an integer number (5201280).

Almost surely, 2^78723726 is an apocalyptic number.

78723726 is an abundant number, since it is smaller than the sum of its proper divisors (87717234).

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

78723726 is a wasteful number, since it uses less digits than its factorization.

78723726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968.

The product of its digits is 197568, while the sum is 42.

The square root of 78723726 is about 8872.6391789591. The cubic root of 78723726 is about 428.5832696093.

The spelling of 78723726 in words is "seventy-eight million, seven hundred twenty-three thousand, seven hundred twenty-six".