78583420 has 24 divisors (see below), whose sum is σ = 166124448. Its totient is φ = 31224000.

The previous prime is 78583399. The next prime is 78583423. The reversal of 78583420 is 2438587.

It is a self number, because there is not a number n which added to its sum of digits gives 78583420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78583423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9991 + ... + 16030.

It is an arithmetic number, because the mean of its divisors is an integer number (6921852).

Almost surely, 2^78583420 is an apocalyptic number.

It is an amenable number.

78583420 is an abundant number, since it is smaller than the sum of its proper divisors (87541028).

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

78583420 is a wasteful number, since it uses less digits than its factorization.

78583420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181 (or 26179 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 78583420 is about 8864.7289862691. The cubic root of 78583420 is about 428.3285028583.

It can be divided in two parts, 78583 and 420, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78583420 in words is "seventy-eight million, five hundred eighty-three thousand, four hundred twenty".