400428870 has 32 divisors (see below), whose sum is σ = 977322240. Its totient is φ = 104970720.

The previous prime is 400428851. The next prime is 400428887. The reversal of 400428870 is 78824004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 111346 + ... + 114885.

It is an arithmetic number, because the mean of its divisors is an integer number (30541320).

Almost surely, 2^400428870 is an apocalyptic number.

400428870 is an abundant number, since it is smaller than the sum of its proper divisors (576893370).

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

400428870 is a wasteful number, since it uses less digits than its factorization.

400428870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226300.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 400428870 is about 20010.7188776416. The cubic root of 400428870 is about 737.0695341042.

The spelling of 400428870 in words is "four hundred million, four hundred twenty-eight thousand, eight hundred seventy".