406299891 has 8 divisors (see below), whose sum is σ = 542465280. Its totient is φ = 270500552.

The previous prime is 406299869. The next prime is 406299893. The reversal of 406299891 is 198992604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406299891 - 2⁶ = 406299827 is a prime.

It is a super-2 number, since 2×406299891² = 330159202853223762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406299891.

It is not an unprimeable number, because it can be changed into a prime (406299893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88911 + ... + 93368.

It is an arithmetic number, because the mean of its divisors is an integer number (67808160).

Almost surely, 2^406299891 is an apocalyptic number.

406299891 is a deficient number, since it is larger than the sum of its proper divisors (136165389).

406299891 is a wasteful number, since it uses less digits than its factorization.

406299891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183025.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 406299891 is about 20156.8819761391. The cubic root of 406299891 is about 740.6543341975.

The spelling of 406299891 in words is "four hundred six million, two hundred ninety-nine thousand, eight hundred ninety-one".