78120458 has 8 divisors (see below), whose sum is σ = 126194628. Its totient is φ = 36055584.

The previous prime is 78120451. The next prime is 78120467. The reversal of 78120458 is 85402187.

It can be written as a sum of positive squares in 2 ways, for example, as 78092569 + 27889 = 8837^2 + 167^2 .

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

It is a super-2 number, since 2×78120458² = 12205611916259528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78120451) 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, 1502291 + ... + 1502342.

Almost surely, 2^78120458 is an apocalyptic number.

78120458 is a deficient number, since it is larger than the sum of its proper divisors (48074170).

78120458 is a wasteful number, since it uses less digits than its factorization.

78120458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004648.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 78120458 is about 8838.5778267773. The cubic root of 78120458 is about 427.4857020172.

The spelling of 78120458 in words is "seventy-eight million, one hundred twenty thousand, four hundred fifty-eight".