401400406 has 16 divisors (see below), whose sum is σ = 657866448. Its totient is φ = 182168800.

The previous prime is 401400401. The next prime is 401400409. The reversal of 401400406 is 604004104.

It is a super-2 number, since 2×401400406² = 322244571873929672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401400401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 28336.

It is an arithmetic number, because the mean of its divisors is an integer number (41116653).

Almost surely, 2^401400406 is an apocalyptic number.

401400406 is a deficient number, since it is larger than the sum of its proper divisors (256466042).

401400406 is a wasteful number, since it uses less digits than its factorization.

401400406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28607.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 401400406 is about 20034.9795607582. The cubic root of 401400406 is about 737.6651548541.

The spelling of 401400406 in words is "four hundred one million, four hundred thousand, four hundred six".