400360028 has 6 divisors (see below), whose sum is σ = 700630056. Its totient is φ = 200180012.

The previous prime is 400360021. The next prime is 400360033. The reversal of 400360028 is 820063004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400359985 and 400360012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400360021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50045000 + ... + 50045007.

It is an arithmetic number, because the mean of its divisors is an integer number (116771676).

Almost surely, 2^400360028 is an apocalyptic number.

It is an amenable number.

400360028 is a deficient number, since it is larger than the sum of its proper divisors (300270028).

400360028 is a wasteful number, since it uses less digits than its factorization.

400360028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100090011 (or 100090009 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 400360028 is about 20008.9986755959. The cubic root of 400360028 is about 737.0272925204.

The spelling of 400360028 in words is "four hundred million, three hundred sixty thousand, twenty-eight".