400068828 has 24 divisors (see below), whose sum is σ = 1037215760. Its totient is φ = 133356240.

The previous prime is 400068811. The next prime is 400068829. The reversal of 400068828 is 828860004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 400068792 and 400068801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400068829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852063 + ... + 1852278.

Almost surely, 2^400068828 is an apocalyptic number.

It is an amenable number.

400068828 is an abundant number, since it is smaller than the sum of its proper divisors (637146932).

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

400068828 is a wasteful number, since it uses less digits than its factorization.

400068828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704354 (or 3704346 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 400068828 is about 20001.7206259862. The cubic root of 400068828 is about 736.8485580577.

The spelling of 400068828 in words is "four hundred million, sixty-eight thousand, eight hundred twenty-eight".