398615 has 12 divisors (see below), whose sum is σ = 556776. Its totient is φ = 273168.

The previous prime is 398611. The next prime is 398621. The reversal of 398615 is 516893.

398615 = T₂₂₃ + T₂₂₄ + ... + T₂₃₇.

It is not a de Polignac number, because 398615 - 2² = 398611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (46398).

2³⁹⁸⁶¹⁵ is an apocalyptic number.

398615 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398615 is a deficient number, since it is larger than the sum of its proper divisors (158161).

398615 is a wasteful number, since it uses less digits than its factorization.

398615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1639 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 398615 is about 631.3596439431. The cubic root of 398615 is about 73.5954919065.

The spelling of 398615 in words is "three hundred ninety-eight thousand, six hundred fifteen".