78704645 has 8 divisors (see below), whose sum is σ = 100001304. Its totient is φ = 59259904.

The previous prime is 78704623. The next prime is 78704677. The reversal of 78704645 is 54640787.

It can be written as a sum of positive squares in 4 ways, for example, as 4072324 + 74632321 = 2018^2 + 8639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78704645 - 2⁶ = 78704581 is a prime.

It is a super-2 number, since 2×78704645² = 12388842289152050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462884 + ... + 463053.

It is an arithmetic number, because the mean of its divisors is an integer number (12500163).

Almost surely, 2^78704645 is an apocalyptic number.

It is an amenable number.

78704645 is a deficient number, since it is larger than the sum of its proper divisors (21296659).

78704645 is a wasteful number, since it uses less digits than its factorization.

78704645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925959.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 78704645 is about 8871.5638418489. The cubic root of 78704645 is about 428.5486402433.

The spelling of 78704645 in words is "seventy-eight million, seven hundred four thousand, six hundred forty-five".