78560401 has 4 divisors (see below), whose sum is σ = 78971904. Its totient is φ = 78148900.

The previous prime is 78560371. The next prime is 78560407. The reversal of 78560401 is 10406587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78560401 - 2¹³ = 78552209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78560407) 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, 205465 + ... + 205846.

It is an arithmetic number, because the mean of its divisors is an integer number (19742976).

Almost surely, 2^78560401 is an apocalyptic number.

It is an amenable number.

78560401 is a deficient number, since it is larger than the sum of its proper divisors (411503).

78560401 is a wasteful number, since it uses less digits than its factorization.

78560401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411502.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78560401 is about 8863.4305435311. The cubic root of 78560401 is about 428.2866761529.

Adding to 78560401 its reverse (10406587), we get a palindrome (88966988).

It can be divided in two parts, 78560 and 401, that added together give a square (78961 = 281²).

The spelling of 78560401 in words is "seventy-eight million, five hundred sixty thousand, four hundred one".