400880485 has 16 divisors (see below), whose sum is σ = 526921200. Its totient is φ = 291429376.

The previous prime is 400880479. The next prime is 400880489. The reversal of 400880485 is 584088004.

It is a Cunningham number, because it is equal to 20022²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 39614436 + 361266049 = 6294^2 + 19007^2 .

It is a cyclic number.

It is not a de Polignac number, because 400880485 - 2¹¹ = 400878437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400880489) 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, 78850 + ... + 83779.

It is an arithmetic number, because the mean of its divisors is an integer number (32932575).

Almost surely, 2^400880485 is an apocalyptic number.

It is an amenable number.

400880485 is a deficient number, since it is larger than the sum of its proper divisors (126040715).

400880485 is a wasteful number, since it uses less digits than its factorization.

400880485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162680.

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 400880485 is about 20022.0000249725. Note that the first 4 decimals coincide. The cubic root of 400880485 is about 737.3465259499.

The spelling of 400880485 in words is "four hundred million, eight hundred eighty thousand, four hundred eighty-five".