398655743 has 8 divisors (see below), whose sum is σ = 406319760. Its totient is φ = 391022080.

The previous prime is 398655737. The next prime is 398655781. The reversal of 398655743 is 347556893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398655743 - 2⁸ = 398655487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398655691 and 398655700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398625743) 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, 19871 + ... + 34527.

It is an arithmetic number, because the mean of its divisors is an integer number (50789970).

Almost surely, 2^398655743 is an apocalyptic number.

398655743 is a deficient number, since it is larger than the sum of its proper divisors (7664017).

398655743 is a wasteful number, since it uses less digits than its factorization.

398655743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15177.

The product of its digits is 2721600, while the sum is 50.

The square root of 398655743 is about 19966.3652926616. The cubic root of 398655743 is about 735.9799925396.

The spelling of 398655743 in words is "three hundred ninety-eight million, six hundred fifty-five thousand, seven hundred forty-three".