400920771 has 16 divisors (see below), whose sum is σ = 538604928. Its totient is φ = 265267200.

The previous prime is 400920769. The next prime is 400920781. The reversal of 400920771 is 177029004.

It is not a de Polignac number, because 400920771 - 2¹ = 400920769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400920781) 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, 254416 + ... + 255986.

It is an arithmetic number, because the mean of its divisors is an integer number (33662808).

Almost surely, 2^400920771 is an apocalyptic number.

400920771 is a deficient number, since it is larger than the sum of its proper divisors (137684157).

400920771 is a wasteful number, since it uses less digits than its factorization.

400920771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 400920771 is about 20023.0060430496. The cubic root of 400920771 is about 737.3712247053.

Adding to 400920771 its reverse (177029004), we get a palindrome (577949775).

The spelling of 400920771 in words is "four hundred million, nine hundred twenty thousand, seven hundred seventy-one".