78578241 has 8 divisors (see below), whose sum is σ = 119738304. Its totient is φ = 44901840.

The previous prime is 78578239. The next prime is 78578249. The reversal of 78578241 is 14287587.

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

It is not a de Polignac number, because 78578241 - 2¹ = 78578239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78578193 and 78578202.

It is not an unprimeable number, because it can be changed into a prime (78578249) 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, 1870890 + ... + 1870931.

It is an arithmetic number, because the mean of its divisors is an integer number (14967288).

Almost surely, 2^78578241 is an apocalyptic number.

It is an amenable number.

78578241 is a deficient number, since it is larger than the sum of its proper divisors (41160063).

78578241 is a wasteful number, since it uses less digits than its factorization.

78578241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741831.

The product of its digits is 125440, while the sum is 42.

The square root of 78578241 is about 8864.4368687469. The cubic root of 78578241 is about 428.3190930615.

The spelling of 78578241 in words is "seventy-eight million, five hundred seventy-eight thousand, two hundred forty-one".