400284533993 has 16 divisors (see below), whose sum is σ = 434646051840. Its totient is φ = 367638011664.

The previous prime is 400284533941. The next prime is 400284534029. The reversal of 400284533993 is 399335482004.

It is a cyclic number.

It is not a de Polignac number, because 400284533993 - 2²² = 400280339689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400284533923) 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, 3371621 + ... + 3488322.

It is an arithmetic number, because the mean of its divisors is an integer number (27165378240).

Almost surely, 2^400284533993 is an apocalyptic number.

400284533993 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

400284533993 is a deficient number, since it is larger than the sum of its proper divisors (34361517847).

400284533993 is a wasteful number, since it uses less digits than its factorization.

400284533993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860068.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 400284533993 in words is "four hundred billion, two hundred eighty-four million, five hundred thirty-three thousand, nine hundred ninety-three".