398703918 has 16 divisors (see below), whose sum is σ = 799189200. Its totient is φ = 132604416.

The previous prime is 398703917. The next prime is 398703937. The reversal of 398703918 is 819307893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398703913) 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, 71305 + ... + 76692.

It is an arithmetic number, because the mean of its divisors is an integer number (49949325).

Almost surely, 2^398703918 is an apocalyptic number.

398703918 is an abundant number, since it is smaller than the sum of its proper divisors (400485282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398703918 is a wasteful number, since it uses less digits than its factorization.

398703918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148451.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 398703918 is about 19967.5716600692. The cubic root of 398703918 is about 736.0096375057.

The spelling of 398703918 in words is "three hundred ninety-eight million, seven hundred three thousand, nine hundred eighteen".