400370028 has 12 divisors (see below), whose sum is σ = 934196760. Its totient is φ = 133456672.

The previous prime is 400370021. The next prime is 400370041. The reversal of 400370028 is 820073004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×400370028³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400370021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16682073 + ... + 16682096.

It is an arithmetic number, because the mean of its divisors is an integer number (77849730).

Almost surely, 2^400370028 is an apocalyptic number.

It is an amenable number.

400370028 is an abundant number, since it is smaller than the sum of its proper divisors (533826732).

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

400370028 is a wasteful number, since it uses less digits than its factorization.

400370028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33364176 (or 33364174 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 400370028 is about 20009.2485616027. The cubic root of 400370028 is about 737.0334288403.

The spelling of 400370028 in words is "four hundred million, three hundred seventy thousand, twenty-eight".