78391041 has 8 divisors (see below), whose sum is σ = 104731200. Its totient is φ = 52155792.

The previous prime is 78391009. The next prime is 78391043. The reversal of 78391041 is 14019387.

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

It is not a de Polignac number, because 78391041 - 2⁵ = 78391009 is a prime.

It is a super-2 number, since 2×78391041² = 12290310618127362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78390993 and 78391011.

It is not an unprimeable number, because it can be changed into a prime (78391043) 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, 24466 + ... + 27483.

It is an arithmetic number, because the mean of its divisors is an integer number (13091400).

Almost surely, 2^78391041 is an apocalyptic number.

It is an amenable number.

78391041 is a deficient number, since it is larger than the sum of its proper divisors (26340159).

78391041 is a wasteful number, since it uses less digits than its factorization.

78391041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52455.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 78391041 is about 8853.8715260614. The cubic root of 78391041 is about 427.9786888536.

The spelling of 78391041 in words is "seventy-eight million, three hundred ninety-one thousand, forty-one".