78488258 has 4 divisors (see below), whose sum is σ = 117732390. Its totient is φ = 39244128.

The previous prime is 78488237. The next prime is 78488279. The reversal of 78488258 is 85288487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85288487 = 41 ⋅2080207.

It is an interprime number because it is at equal distance from previous prime (78488237) and next prime (78488279).

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 30283009 = 6943^2 + 5503^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19622063 + ... + 19622066.

Almost surely, 2^78488258 is an apocalyptic number.

78488258 is a deficient number, since it is larger than the sum of its proper divisors (39244132).

78488258 is a wasteful number, since it uses less digits than its factorization.

78488258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39244131.

The product of its digits is 1146880, while the sum is 50.

The square root of 78488258 is about 8859.3599091582. The cubic root of 78488258 is about 428.1555356628.

The spelling of 78488258 in words is "seventy-eight million, four hundred eighty-eight thousand, two hundred fifty-eight".