406278401 has 8 divisors (see below), whose sum is σ = 412962624. Its totient is φ = 399621040.

The previous prime is 406278391. The next prime is 406278407. The reversal of 406278401 is 104872604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406278401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406278407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24995 + ... + 37911.

It is an arithmetic number, because the mean of its divisors is an integer number (51620328).

Almost surely, 2^406278401 is an apocalyptic number.

It is an amenable number.

406278401 is a deficient number, since it is larger than the sum of its proper divisors (6684223).

406278401 is a wasteful number, since it uses less digits than its factorization.

406278401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13431.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 406278401 is about 20156.3489005326. The cubic root of 406278401 is about 740.6412757460.

The spelling of 406278401 in words is "four hundred six million, two hundred seventy-eight thousand, four hundred one".