401026506 has 8 divisors (see below), whose sum is σ = 802053024. Its totient is φ = 133675500.

The previous prime is 401026489. The next prime is 401026511. The reversal of 401026506 is 605620104.

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

401026506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33418870 + ... + 33418881.

It is an arithmetic number, because the mean of its divisors is an integer number (100256628).

Almost surely, 2^401026506 is an apocalyptic number.

401026506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401026506 is a wasteful number, since it uses less digits than its factorization.

401026506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66837756.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 401026506 is about 20025.6462068019. The cubic root of 401026506 is about 737.4360414131.

The spelling of 401026506 in words is "four hundred one million, twenty-six thousand, five hundred six".