400025305 has 16 divisors (see below), whose sum is σ = 484683264. Its totient is φ = 316934080.

The previous prime is 400025303. The next prime is 400025377. The reversal of 400025305 is 503520004.

It is a happy number.

It is not a de Polignac number, because 400025305 - 2¹ = 400025303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400025303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268272 + ... + 269758.

It is an arithmetic number, because the mean of its divisors is an integer number (30292704).

Almost surely, 2^400025305 is an apocalyptic number.

It is an amenable number.

400025305 is a deficient number, since it is larger than the sum of its proper divisors (84657959).

400025305 is a wasteful number, since it uses less digits than its factorization.

400025305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 400025305 is about 20000.6326149950. The cubic root of 400025305 is about 736.8218368033.

Adding to 400025305 its reverse (503520004), we get a palindrome (903545309).

The spelling of 400025305 in words is "four hundred million, twenty-five thousand, three hundred five".