400650345 has 24 divisors (see below), whose sum is σ = 694943496. Its totient is φ = 213531648.

The previous prime is 400650343. The next prime is 400650361. The reversal of 400650345 is 543056004.

400650345 is a `hidden beast` number, since 4 + 0 + 0 + 650 + 3 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 171400464 + 229249881 = 13092^2 + 15141^2 .

It is not a de Polignac number, because 400650345 - 2¹ = 400650343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400650343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100327 + ... + 104243.

It is an arithmetic number, because the mean of its divisors is an integer number (28955979).

Almost surely, 2^400650345 is an apocalyptic number.

400650345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400650345 is a deficient number, since it is larger than the sum of its proper divisors (294293151).

400650345 is a wasteful number, since it uses less digits than its factorization.

400650345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201 (or 6198 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 400650345 is about 20016.2520217947. The cubic root of 400650345 is about 737.2053987569.

The spelling of 400650345 in words is "four hundred million, six hundred fifty thousand, three hundred forty-five".