400868036 has 6 divisors (see below), whose sum is σ = 701519070. Its totient is φ = 200434016.

The previous prime is 400868033. The next prime is 400868057. The reversal of 400868036 is 630868004.

It can be written as a sum of positive squares in only one way, i.e., 252174400 + 148693636 = 15880^2 + 12194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400867987 and 400868005.

It is not an unprimeable number, because it can be changed into a prime (400868033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50108501 + ... + 50108508.

It is an arithmetic number, because the mean of its divisors is an integer number (116919845).

Almost surely, 2^400868036 is an apocalyptic number.

It is an amenable number.

400868036 is a deficient number, since it is larger than the sum of its proper divisors (300651034).

400868036 is a wasteful number, since it uses less digits than its factorization.

400868036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100217013 (or 100217011 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 400868036 is about 20021.6891395307. The cubic root of 400868036 is about 737.3388933160.

The spelling of 400868036 in words is "four hundred million, eight hundred sixty-eight thousand, thirty-six".