78364538 has 8 divisors (see below), whose sum is σ = 134339232. Its totient is φ = 33584796.

The previous prime is 78364537. The next prime is 78364547. The reversal of 78364538 is 83546387.

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

It is a super-2 number, since 2×78364538² = 12282001631906888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78364537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798720 + ... + 2798747.

It is an arithmetic number, because the mean of its divisors is an integer number (16792404).

Almost surely, 2^78364538 is an apocalyptic number.

78364538 is a deficient number, since it is larger than the sum of its proper divisors (55974694).

78364538 is a wasteful number, since it uses less digits than its factorization.

78364538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597476.

The product of its digits is 483840, while the sum is 44.

The square root of 78364538 is about 8852.3747096471. The cubic root of 78364538 is about 427.9304520587.

The spelling of 78364538 in words is "seventy-eight million, three hundred sixty-four thousand, five hundred thirty-eight".