400630461 has 32 divisors (see below), whose sum is σ = 669772800. Its totient is φ = 206935680.

The previous prime is 400630379. The next prime is 400630471. The reversal of 400630461 is 164036004.

It is not a de Polignac number, because 400630461 - 2¹⁹ = 400106173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400630471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36505 + ... + 46193.

It is an arithmetic number, because the mean of its divisors is an integer number (20930400).

Almost surely, 2^400630461 is an apocalyptic number.

It is an amenable number.

400630461 is a deficient number, since it is larger than the sum of its proper divisors (269142339).

400630461 is a wasteful number, since it uses less digits than its factorization.

400630461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 400630461 is about 20015.7553192479. The cubic root of 400630461 is about 737.1932028902.

Adding to 400630461 its reverse (164036004), we get a palindrome (564666465).

The spelling of 400630461 in words is "four hundred million, six hundred thirty thousand, four hundred sixty-one".