400797439 has 8 divisors (see below), whose sum is σ = 459520160. Its totient is φ = 342441216.

The previous prime is 400797437. The next prime is 400797479. The reversal of 400797439 is 934797004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400797439 - 2¹ = 400797437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400797395 and 400797404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400797437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89274 + ... + 93655.

It is an arithmetic number, because the mean of its divisors is an integer number (57440020).

Almost surely, 2^400797439 is an apocalyptic number.

400797439 is a deficient number, since it is larger than the sum of its proper divisors (58722721).

400797439 is a wasteful number, since it uses less digits than its factorization.

400797439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183249.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 400797439 is about 20019.9260488145. The cubic root of 400797439 is about 737.2956064441.

The spelling of 400797439 in words is "four hundred million, seven hundred ninety-seven thousand, four hundred thirty-nine".