401506406 has 8 divisors (see below), whose sum is σ = 688296720. Its totient is φ = 172074168.

The previous prime is 401506403. The next prime is 401506447. The reversal of 401506406 is 604605104.

It is a happy number.

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

It is a super-2 number, since 2×401506406² = 322414788118073672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401506403) 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, 14339501 + ... + 14339528.

It is an arithmetic number, because the mean of its divisors is an integer number (86037090).

Almost surely, 2^401506406 is an apocalyptic number.

401506406 is a deficient number, since it is larger than the sum of its proper divisors (286790314).

401506406 is a wasteful number, since it uses less digits than its factorization.

401506406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28679038.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 401506406 is about 20037.6247594369. The cubic root of 401506406 is about 737.7300822295.

The spelling of 401506406 in words is "four hundred one million, five hundred six thousand, four hundred six".