398829995 has 4 divisors (see below), whose sum is σ = 478596000. Its totient is φ = 319063992.

The previous prime is 398829983. The next prime is 398830009. The reversal of 398829995 is 599928893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 599928893 = 2803 ⋅214031.

It is a cyclic number.

It is not a de Polignac number, because 398829995 - 2¹⁶ = 398764459 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39882995 + ... + 39883004.

It is an arithmetic number, because the mean of its divisors is an integer number (119649000).

Almost surely, 2^398829995 is an apocalyptic number.

398829995 is a deficient number, since it is larger than the sum of its proper divisors (79766005).

398829995 is an equidigital number, since it uses as much as digits as its factorization.

398829995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79766004.

The product of its digits is 12597120, while the sum is 62.

The square root of 398829995 is about 19970.7284544155. The cubic root of 398829995 is about 736.0872089429.

The spelling of 398829995 in words is "three hundred ninety-eight million, eight hundred twenty-nine thousand, nine hundred ninety-five".