401723156 has 24 divisors (see below), whose sum is σ = 751070880. Its totient is φ = 187447392.

The previous prime is 401723149. The next prime is 401723177. The reversal of 401723156 is 651327104.

It is a super-2 number, since 2×401723156² = 322762988133200672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 34355 + ... + 44538.

It is an arithmetic number, because the mean of its divisors is an integer number (31294620).

Almost surely, 2^401723156 is an apocalyptic number.

It is an amenable number.

401723156 is a deficient number, since it is larger than the sum of its proper divisors (349347724).

401723156 is a wasteful number, since it uses less digits than its factorization.

401723156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78983 (or 78981 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 401723156 is about 20043.0326048729. The cubic root of 401723156 is about 737.8628108962.

The spelling of 401723156 in words is "four hundred one million, seven hundred twenty-three thousand, one hundred fifty-six".