400838156 has 6 divisors (see below), whose sum is σ = 701466780. Its totient is φ = 200419076.

The previous prime is 400838149. The next prime is 400838159. The reversal of 400838156 is 651838004.

It is not an unprimeable number, because it can be changed into a prime (400838159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50104766 + ... + 50104773.

It is an arithmetic number, because the mean of its divisors is an integer number (116911130).

Almost surely, 2^400838156 is an apocalyptic number.

It is an amenable number.

400838156 is a deficient number, since it is larger than the sum of its proper divisors (300628624).

400838156 is a wasteful number, since it uses less digits than its factorization.

400838156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100209543 (or 100209541 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 400838156 is about 20020.9429348370. The cubic root of 400838156 is about 737.3205728784.

The spelling of 400838156 in words is "four hundred million, eight hundred thirty-eight thousand, one hundred fifty-six".