398607811 has 4 divisors (see below), whose sum is σ = 455551792. Its totient is φ = 341663832.

The previous prime is 398607757. The next prime is 398607887. The reversal of 398607811 is 118706893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118706893 = 179 ⋅663167.

It is a cyclic number.

It is not a de Polignac number, because 398607811 - 2⁹ = 398607299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398607511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28471980 + ... + 28471993.

It is an arithmetic number, because the mean of its divisors is an integer number (113887948).

Almost surely, 2^398607811 is an apocalyptic number.

398607811 is a deficient number, since it is larger than the sum of its proper divisors (56943981).

398607811 is an equidigital number, since it uses as much as digits as its factorization.

398607811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56943980.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 398607811 is about 19965.1649379613. The cubic root of 398607811 is about 735.9504947356.

The spelling of 398607811 in words is "three hundred ninety-eight million, six hundred seven thousand, eight hundred eleven".