400640467 has 2 divisors, whose sum is σ = 400640468. Its totient is φ = 400640466.

The previous prime is 400640453. The next prime is 400640501. The reversal of 400640467 is 764046004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400640467 - 2¹⁹ = 400116179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400640407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200320233 + 200320234.

It is an arithmetic number, because the mean of its divisors is an integer number (200320234).

Almost surely, 2^400640467 is an apocalyptic number.

400640467 is a deficient number, since it is larger than the sum of its proper divisors (1).

400640467 is an equidigital number, since it uses as much as digits as its factorization.

400640467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 400640467 is about 20016.0052707827. The cubic root of 400640467 is about 737.1993401285.

The spelling of 400640467 in words is "four hundred million, six hundred forty thousand, four hundred sixty-seven".