406440730140 has 96 divisors (see below), whose sum is σ = 1177810127424. Its totient is φ = 104650506240.

The previous prime is 406440730079. The next prime is 406440730147. The reversal of 406440730140 is 41037044604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406440730147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 613029 + ... + 1090268.

It is an arithmetic number, because the mean of its divisors is an integer number (12268855494).

Almost surely, 2^406440730140 is an apocalyptic number.

It is an amenable number.

406440730140 is an abundant number, since it is smaller than the sum of its proper divisors (771369397284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406440730140 is a wasteful number, since it uses less digits than its factorization.

406440730140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703447 (or 1703445 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

Adding to 406440730140 its reverse (41037044604), we get a palindrome (447477774744).

The spelling of 406440730140 in words is "four hundred six billion, four hundred forty million, seven hundred thirty thousand, one hundred forty".