406640075 has 12 divisors (see below), whose sum is σ = 511337808. Its totient is φ = 320728800.

The previous prime is 406640057. The next prime is 406640089. The reversal of 406640075 is 570046604.

406640075 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 406640075 - 2⁶ = 406640011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112772 + ... + 116321.

It is an arithmetic number, because the mean of its divisors is an integer number (42611484).

Almost surely, 2^406640075 is an apocalyptic number.

406640075 is a deficient number, since it is larger than the sum of its proper divisors (104697733).

406640075 is a wasteful number, since it uses less digits than its factorization.

406640075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229174 (or 229169 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 406640075 is about 20165.3186188565. The cubic root of 406640075 is about 740.8609865356.

Adding to 406640075 its reverse (570046604), we get a palindrome (976686679).

The spelling of 406640075 in words is "four hundred six million, six hundred forty thousand, seventy-five".