78097305 has 64 divisors (see below), whose sum is σ = 153280512. Its totient is φ = 33411840.

The previous prime is 78097291. The next prime is 78097309. The reversal of 78097305 is 50379087.

It is not a de Polignac number, because 78097305 - 2¹⁴ = 78080921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (78097309) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48544 + ... + 50126.

It is an arithmetic number, because the mean of its divisors is an integer number (2395008).

Almost surely, 2^78097305 is an apocalyptic number.

It is an amenable number.

78097305 is a deficient number, since it is larger than the sum of its proper divisors (75183207).

78097305 is a wasteful number, since it uses less digits than its factorization.

78097305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 78097305 is about 8837.2679601786. The cubic root of 78097305 is about 427.4434657294.

The spelling of 78097305 in words is "seventy-eight million, ninety-seven thousand, three hundred five".