19408401 has 12 divisors (see below), whose sum is σ = 28074228. Its totient is φ = 12920544.

The previous prime is 19408399. The next prime is 19408421. The reversal of 19408401 is 10480491.

It can be written as a sum of positive squares in 2 ways, for example, as 13133376 + 6275025 = 3624^2 + 2505^2 .

It is not a de Polignac number, because 19408401 - 2¹ = 19408399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19408421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8851 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (2339519).

Almost surely, 2^19408401 is an apocalyptic number.

It is an amenable number.

19408401 is a deficient number, since it is larger than the sum of its proper divisors (8665827).

19408401 is a wasteful number, since it uses less digits than its factorization.

19408401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 19408401 is about 4405.4966802848. The cubic root of 19408401 is about 268.7385186370.

Adding to 19408401 its reverse (10480491), we get a palindrome (29888892).

The spelling of 19408401 in words is "nineteen million, four hundred eight thousand, four hundred one".