400919893 has 16 divisors (see below), whose sum is σ = 467274240. Its totient is φ = 340124400.

The previous prime is 400919879. The next prime is 400919899. The reversal of 400919893 is 398919004.

It is not a de Polignac number, because 400919893 - 2⁵ = 400919861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400919899) 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 15 ways as a sum of consecutive naturals, for example, 313 + ... + 28318.

It is an arithmetic number, because the mean of its divisors is an integer number (29204640).

Almost surely, 2^400919893 is an apocalyptic number.

It is an amenable number.

400919893 is a deficient number, since it is larger than the sum of its proper divisors (66354347).

400919893 is a wasteful number, since it uses less digits than its factorization.

400919893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28728.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 400919893 is about 20022.9841182577. The cubic root of 400919893 is about 737.3706864340.

The spelling of 400919893 in words is "four hundred million, nine hundred nineteen thousand, eight hundred ninety-three".