400667289 has 32 divisors (see below), whose sum is σ = 600998400. Its totient is φ = 235359360.

The previous prime is 400667279. The next prime is 400667317. The reversal of 400667289 is 982766004.

It is not a de Polignac number, because 400667289 - 2⁴ = 400667273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400667289.

It is not an unprimeable number, because it can be changed into a prime (400667279) 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, 140722 + ... + 143540.

It is an arithmetic number, because the mean of its divisors is an integer number (18781200).

Almost surely, 2^400667289 is an apocalyptic number.

It is an amenable number.

400667289 is a deficient number, since it is larger than the sum of its proper divisors (200331111).

400667289 is a wasteful number, since it uses less digits than its factorization.

400667289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 400667289 is about 20016.6752733814. The cubic root of 400667289 is about 737.2157910540.

The spelling of 400667289 in words is "four hundred million, six hundred sixty-seven thousand, two hundred eighty-nine".