400043377 has 4 divisors (see below), whose sum is σ = 400132836. Its totient is φ = 399953920.

The previous prime is 400043363. The next prime is 400043381. The reversal of 400043377 is 773340004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 258695056 + 141348321 = 16084^2 + 11889^2 .

It is a cyclic number.

It is not a de Polignac number, because 400043377 - 2¹⁵ = 400010609 is a prime.

It is a super-4 number, since 4×400043377⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400043327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37648 + ... + 47089.

It is an arithmetic number, because the mean of its divisors is an integer number (100033209).

Almost surely, 2^400043377 is an apocalyptic number.

It is an amenable number.

400043377 is a deficient number, since it is larger than the sum of its proper divisors (89459).

400043377 is an equidigital number, since it uses as much as digits as its factorization.

400043377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89458.

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 400043377 is about 20001.0843956022. The cubic root of 400043377 is about 736.8329324711.

The spelling of 400043377 in words is "four hundred million, forty-three thousand, three hundred seventy-seven".