78017401 has 16 divisors (see below), whose sum is σ = 102389760. Its totient is φ = 57592080.

The previous prime is 78017393. The next prime is 78017447. The reversal of 78017401 is 10471087.

It is not a de Polignac number, because 78017401 - 2³ = 78017393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78017401.

It is not an unprimeable number, because it can be changed into a prime (78017501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25201 + ... + 28126.

It is an arithmetic number, because the mean of its divisors is an integer number (6399360).

Almost surely, 2^78017401 is an apocalyptic number.

It is an amenable number.

78017401 is a deficient number, since it is larger than the sum of its proper divisors (24372359).

78017401 is a wasteful number, since it uses less digits than its factorization.

78017401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53364.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 78017401 is about 8832.7459490240. The cubic root of 78017401 is about 427.2976386850.

Adding to 78017401 its reverse (10471087), we get a palindrome (88488488).

It can be divided in two parts, 780 and 17401, that added together give a palindrome (18181).

The spelling of 78017401 in words is "seventy-eight million, seventeen thousand, four hundred one".