398807494 has 4 divisors (see below), whose sum is σ = 598211244. Its totient is φ = 199403746.

The previous prime is 398807483. The next prime is 398807501. The reversal of 398807494 is 494708893.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99701872 + ... + 99701875.

It is an arithmetic number, because the mean of its divisors is an integer number (149552811).

Almost surely, 2^398807494 is an apocalyptic number.

398807494 is a deficient number, since it is larger than the sum of its proper divisors (199403750).

398807494 is a wasteful number, since it uses less digits than its factorization.

398807494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199403749.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 398807494 is about 19970.1650969640. The cubic root of 398807494 is about 736.0733659438.

It can be divided in two parts, 39880 and 7494, that added together give a palindrome (47374).

The spelling of 398807494 in words is "three hundred ninety-eight million, eight hundred seven thousand, four hundred ninety-four".