398079615 has 8 divisors (see below), whose sum is σ = 636927408. Its totient is φ = 212309120.

The previous prime is 398079611. The next prime is 398079691. The reversal of 398079615 is 516970893.

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

It is not a de Polignac number, because 398079615 - 2² = 398079611 is a prime.

It is a super-3 number, since 3×398079615³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398079611) 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, 13269306 + ... + 13269335.

It is an arithmetic number, because the mean of its divisors is an integer number (79615926).

Almost surely, 2^398079615 is an apocalyptic number.

398079615 is a deficient number, since it is larger than the sum of its proper divisors (238847793).

398079615 is a wasteful number, since it uses less digits than its factorization.

398079615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26538649.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 398079615 is about 19951.9326131581. The cubic root of 398079615 is about 735.6252812267.

The spelling of 398079615 in words is "three hundred ninety-eight million, seventy-nine thousand, six hundred fifteen".