400345425 has 36 divisors (see below), whose sum is σ = 718146000. Its totient is φ = 213195360.

The previous prime is 400345423. The next prime is 400345457. The reversal of 400345425 is 524543004.

It is not a de Polignac number, because 400345425 - 2¹ = 400345423 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400345423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 266326 + ... + 267824.

It is an arithmetic number, because the mean of its divisors is an integer number (19948500).

Almost surely, 2^400345425 is an apocalyptic number.

400345425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400345425 is a deficient number, since it is larger than the sum of its proper divisors (317800575).

400345425 is a wasteful number, since it uses less digits than its factorization.

400345425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2694 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 400345425 is about 20008.6337614541. The cubic root of 400345425 is about 737.0183314690.

Adding to 400345425 its reverse (524543004), we get a palindrome (924888429).

The spelling of 400345425 in words is "four hundred million, three hundred forty-five thousand, four hundred twenty-five".