398742854 has 16 divisors (see below), whose sum is σ = 666630000. Its totient is φ = 177767424.

The previous prime is 398742853. The next prime is 398742857. The reversal of 398742854 is 458247893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398742853) 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, 307979 + ... + 309270.

It is an arithmetic number, because the mean of its divisors is an integer number (41664375).

Almost surely, 2^398742854 is an apocalyptic number.

398742854 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

398742854 is a deficient number, since it is larger than the sum of its proper divisors (267887146).

398742854 is a wasteful number, since it uses less digits than its factorization.

398742854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617287.

The product of its digits is 1935360, while the sum is 50.

The square root of 398742854 is about 19968.5466171176. The cubic root of 398742854 is about 736.0335954163.

The spelling of 398742854 in words is "three hundred ninety-eight million, seven hundred forty-two thousand, eight hundred fifty-four".