400282716987 has 6 divisors (see below), whose sum is σ = 578186146772. Its totient is φ = 266855144652.

The previous prime is 400282716931. The next prime is 400282716989. The reversal of 400282716987 is 789617282004.

It is a happy number.

400282716987 is a `hidden beast` number, since 400 + 2 + 82 + 71 + 6 + 98 + 7 = 666.

It is not a de Polignac number, because 400282716987 - 2¹¹ = 400282714939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400282716989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22237928713 + ... + 22237928730.

Almost surely, 2^400282716987 is an apocalyptic number.

400282716987 is a deficient number, since it is larger than the sum of its proper divisors (177903429785).

400282716987 is a wasteful number, since it uses less digits than its factorization.

400282716987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44475857449 (or 44475857446 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

Adding to 400282716987 its sum of digits (54), we get a square (400282717041 = 632679²).

The spelling of 400282716987 in words is "four hundred billion, two hundred eighty-two million, seven hundred sixteen thousand, nine hundred eighty-seven".