78026420 has 24 divisors (see below), whose sum is σ = 164342304. Its totient is φ = 31117856.

The previous prime is 78026393. The next prime is 78026449. The reversal of 78026420 is 2462087.

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 7 ways as a sum of consecutive naturals, for example, 1319 + ... + 12561.

It is an arithmetic number, because the mean of its divisors is an integer number (6847596).

Almost surely, 2^78026420 is an apocalyptic number.

It is an amenable number.

78026420 is an abundant number, since it is smaller than the sum of its proper divisors (86315884).

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

78026420 is a wasteful number, since it uses less digits than its factorization.

78026420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11599 (or 11597 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 78026420 is about 8833.2564776531. The cubic root of 78026420 is about 427.3141035969.

The spelling of 78026420 in words is "seventy-eight million, twenty-six thousand, four hundred twenty".