400136530 has 32 divisors (see below), whose sum is σ = 746270208. Its totient is φ = 154310400.

The previous prime is 400136491. The next prime is 400136533. The reversal of 400136530 is 35631004.

It is not an unprimeable number, because it can be changed into a prime (400136533) 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, 85450 + ... + 90010.

It is an arithmetic number, because the mean of its divisors is an integer number (23320944).

Almost surely, 2^400136530 is an apocalyptic number.

400136530 is a deficient number, since it is larger than the sum of its proper divisors (346133678).

400136530 is a wasteful number, since it uses less digits than its factorization.

400136530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 400136530 is about 20003.4129587928. The cubic root of 400136530 is about 736.8901203289.

Adding to 400136530 its reverse (35631004), we get a palindrome (435767534).

The spelling of 400136530 in words is "four hundred million, one hundred thirty-six thousand, five hundred thirty".