398279555 has 8 divisors (see below), whose sum is σ = 478744992. Its totient is φ = 318083968.

The previous prime is 398279513. The next prime is 398279597. The reversal of 398279555 is 555972893.

It is an interprime number because it is at equal distance from previous prime (398279513) and next prime (398279597).

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 398279555 - 2¹² = 398275459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398279497 and 398279506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64199 + ... + 70128.

It is an arithmetic number, because the mean of its divisors is an integer number (59843124).

Almost surely, 2^398279555 is an apocalyptic number.

398279555 is a deficient number, since it is larger than the sum of its proper divisors (80465437).

398279555 is a wasteful number, since it uses less digits than its factorization.

398279555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134925.

The product of its digits is 3402000, while the sum is 53.

The square root of 398279555 is about 19956.9425263491. The cubic root of 398279555 is about 735.7484193258.

The spelling of 398279555 in words is "three hundred ninety-eight million, two hundred seventy-nine thousand, five hundred fifty-five".