78913390 has 16 divisors (see below), whose sum is σ = 142145280. Its totient is φ = 31542880.

The previous prime is 78913333. The next prime is 78913399. The reversal of 78913390 is 9331987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78913399) 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, 25971 + ... + 28849.

It is an arithmetic number, because the mean of its divisors is an integer number (8884080).

Almost surely, 2^78913390 is an apocalyptic number.

78913390 is a deficient number, since it is larger than the sum of its proper divisors (63231890).

78913390 is a wasteful number, since it uses less digits than its factorization.

78913390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 78913390 is about 8883.3208880463. The cubic root of 78913390 is about 428.9271795880.

The spelling of 78913390 in words is "seventy-eight million, nine hundred thirteen thousand, three hundred ninety".