400442245 has 8 divisors (see below), whose sum is σ = 549177984. Its totient is φ = 274588944.

The previous prime is 400442243. The next prime is 400442279. The reversal of 400442245 is 542244004.

It is a happy number.

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

It is not a de Polignac number, because 400442245 - 2¹ = 400442243 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 (400442243) 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, 5720569 + ... + 5720638.

It is an arithmetic number, because the mean of its divisors is an integer number (68647248).

Almost surely, 2^400442245 is an apocalyptic number.

It is an amenable number.

400442245 is a deficient number, since it is larger than the sum of its proper divisors (148735739).

400442245 is a wasteful number, since it uses less digits than its factorization.

400442245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11441219.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 400442245 is about 20011.0530707407. The cubic root of 400442245 is about 737.0777404682.

Adding to 400442245 its reverse (542244004), we get a palindrome (942686249).

The spelling of 400442245 in words is "four hundred million, four hundred forty-two thousand, two hundred forty-five".