426400191 has 12 divisors (see below), whose sum is σ = 703898832. Its totient is φ = 243657216.

The previous prime is 426400141. The next prime is 426400201. The reversal of 426400191 is 191004624.

426400191 is a `hidden beast` number, since 4 + 2 + 640 + 0 + 19 + 1 = 666.

It is not a de Polignac number, because 426400191 - 2⁷ = 426400063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426400141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3384066 + ... + 3384191.

It is an arithmetic number, because the mean of its divisors is an integer number (58658236).

Almost surely, 2^426400191 is an apocalyptic number.

426400191 is a deficient number, since it is larger than the sum of its proper divisors (277498641).

426400191 is a wasteful number, since it uses less digits than its factorization.

426400191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768270 (or 6768267 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 426400191 is about 20649.4598234433. The cubic root of 426400191 is about 752.6720634635.

The spelling of 426400191 in words is "four hundred twenty-six million, four hundred thousand, one hundred ninety-one".