74400401 has 4 divisors (see below), whose sum is σ = 74550000. Its totient is φ = 74250804.

The previous prime is 74400373. The next prime is 74400407. The reversal of 74400401 is 10400447.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10400447 = 17 ⋅611791.

It is a cyclic number.

It is not a de Polignac number, because 74400401 - 2¹⁴ = 74384017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74400407) 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, 74051 + ... + 75048.

It is an arithmetic number, because the mean of its divisors is an integer number (18637500).

Almost surely, 2^74400401 is an apocalyptic number.

It is an amenable number.

74400401 is a deficient number, since it is larger than the sum of its proper divisors (149599).

74400401 is a wasteful number, since it uses less digits than its factorization.

74400401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149598.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 74400401 is about 8625.5667060200. The cubic root of 74400401 is about 420.5894991186.

Adding to 74400401 its reverse (10400447), we get a palindrome (84800848).

The spelling of 74400401 in words is "seventy-four million, four hundred thousand, four hundred one".