78658213 has 8 divisors (see below), whose sum is σ = 82293120. Its totient is φ = 75105120.

The previous prime is 78658207. The next prime is 78658241. The reversal of 78658213 is 31285687.

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 78658213 - 2¹³ = 78650021 is a prime.

It is a super-2 number, since 2×78658213² = 12374228944706738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78658313) 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, 18483 + ... + 22336.

It is an arithmetic number, because the mean of its divisors is an integer number (10286640).

Almost surely, 2^78658213 is an apocalyptic number.

It is an amenable number.

78658213 is a deficient number, since it is larger than the sum of its proper divisors (3634907).

78658213 is a wasteful number, since it uses less digits than its factorization.

78658213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40907.

The product of its digits is 80640, while the sum is 40.

The square root of 78658213 is about 8868.9465552567. The cubic root of 78658213 is about 428.4643492218.

The spelling of 78658213 in words is "seventy-eight million, six hundred fifty-eight thousand, two hundred thirteen".