403916401 has 16 divisors (see below), whose sum is σ = 469526400. Its totient is φ = 340306560.

The previous prime is 403916399. The next prime is 403916407. The reversal of 403916401 is 104619304.

It is a cyclic number.

It is not a de Polignac number, because 403916401 - 2¹ = 403916399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403916401.

It is not an unprimeable number, because it can be changed into a prime (403916407) 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, 384525 + ... + 385573.

It is an arithmetic number, because the mean of its divisors is an integer number (29345400).

Almost surely, 2^403916401 is an apocalyptic number.

It is an amenable number.

403916401 is a deficient number, since it is larger than the sum of its proper divisors (65609999).

403916401 is a wasteful number, since it uses less digits than its factorization.

403916401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 403916401 is about 20097.6715317969. The cubic root of 403916401 is about 739.2031848039.

It can be divided in two parts, 40 and 3916401, that added together give a square (3916441 = 1979²).

The spelling of 403916401 in words is "four hundred three million, nine hundred sixteen thousand, four hundred one".