400776393 has 8 divisors (see below), whose sum is σ = 536257888. Its totient is φ = 266239584.

The previous prime is 400776391. The next prime is 400776419. The reversal of 400776393 is 393677004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400776393 - 2¹ = 400776391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400776391) 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 7 ways as a sum of consecutive naturals, for example, 235180 + ... + 236877.

It is an arithmetic number, because the mean of its divisors is an integer number (67032236).

Almost surely, 2^400776393 is an apocalyptic number.

It is an amenable number.

400776393 is a deficient number, since it is larger than the sum of its proper divisors (135481495).

400776393 is a wasteful number, since it uses less digits than its factorization.

400776393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472343.

The product of its (nonzero) digits is 95256, while the sum is 39.

The square root of 400776393 is about 20019.4004155969. The cubic root of 400776393 is about 737.2827010099.

The spelling of 400776393 in words is "four hundred million, seven hundred seventy-six thousand, three hundred ninety-three".