398097620 has 12 divisors (see below), whose sum is σ = 836005044. Its totient is φ = 159239040.

The previous prime is 398097607. The next prime is 398097641. The reversal of 398097620 is 26790893.

It can be written as a sum of positive squares in 2 ways, for example, as 65254084 + 332843536 = 8078^2 + 18244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9952421 + ... + 9952460.

It is an arithmetic number, because the mean of its divisors is an integer number (69667087).

Almost surely, 2^398097620 is an apocalyptic number.

It is an amenable number.

398097620 is an abundant number, since it is smaller than the sum of its proper divisors (437907424).

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

398097620 is a wasteful number, since it uses less digits than its factorization.

398097620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19904890 (or 19904888 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 398097620 is about 19952.3838174791. The cubic root of 398097620 is about 735.6363717498.

The spelling of 398097620 in words is "three hundred ninety-eight million, ninety-seven thousand, six hundred twenty".