400428943 has 16 divisors (see below), whose sum is σ = 417437856. Its totient is φ = 383846400.

The previous prime is 400428887. The next prime is 400428979. The reversal of 400428943 is 349824004.

It is a cyclic number.

It is not a de Polignac number, because 400428943 - 2¹³ = 400420751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400428899 and 400428908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400428443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594655 + ... + 595327.

It is an arithmetic number, because the mean of its divisors is an integer number (26089866).

Almost surely, 2^400428943 is an apocalyptic number.

400428943 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

400428943 is a deficient number, since it is larger than the sum of its proper divisors (17008913).

400428943 is a wasteful number, since it uses less digits than its factorization.

400428943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 400428943 is about 20010.7207016639. The cubic root of 400428943 is about 737.0695788945.

The spelling of 400428943 in words is "four hundred million, four hundred twenty-eight thousand, nine hundred forty-three".