400444245 has 12 divisors (see below), whose sum is σ = 694103436. Its totient is φ = 213570240.

The previous prime is 400444241. The next prime is 400444249. The reversal of 400444245 is 542444004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400444241) and next prime (400444249).

It can be written as a sum of positive squares in 2 ways, for example, as 171557604 + 228886641 = 13098^2 + 15129^2 .

It is not a de Polignac number, because 400444245 - 2² = 400444241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4449336 + ... + 4449425.

It is an arithmetic number, because the mean of its divisors is an integer number (57841953).

Almost surely, 2^400444245 is an apocalyptic number.

400444245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400444245 is a deficient number, since it is larger than the sum of its proper divisors (293659191).

400444245 is a wasteful number, since it uses less digits than its factorization.

400444245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8898772 (or 8898769 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 400444245 is about 20011.1030430609. The cubic root of 400444245 is about 737.0789675724.

Adding to 400444245 its reverse (542444004), we get a palindrome (942888249).

It can be divided in two parts, 400444 and 245, that added together give a square (400689 = 633²).

The spelling of 400444245 in words is "four hundred million, four hundred forty-four thousand, two hundred forty-five".