78573620 has 12 divisors (see below), whose sum is σ = 165004644. Its totient is φ = 31429440.

The previous prime is 78573619. The next prime is 78573679. The reversal of 78573620 is 2637587.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59876644 + 18696976 = 7738^2 + 4324^2 .

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 3 ways as a sum of consecutive naturals, for example, 1964321 + ... + 1964360.

It is an arithmetic number, because the mean of its divisors is an integer number (13750387).

Almost surely, 2^78573620 is an apocalyptic number.

It is an amenable number.

78573620 is an abundant number, since it is smaller than the sum of its proper divisors (86431024).

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

78573620 is a wasteful number, since it uses less digits than its factorization.

78573620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928690 (or 3928688 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 78573620 is about 8864.1762166600. The cubic root of 78573620 is about 428.3106967536.

The spelling of 78573620 in words is "seventy-eight million, five hundred seventy-three thousand, six hundred twenty".