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398042399 = 1321301319
BaseRepresentation
bin10111101110011…
…010010100011111
31000201222122112002
4113232122110133
51303344324044
6103255232515
712602206316
oct2756322437
91021878462
10398042399
11194759167
12b137873b
1364607561
143ac1527d
1524e2874e
hex17b9a51f

398042399 has 4 divisors (see below), whose sum is σ = 398345040. Its totient is φ = 397739760.

The previous prime is 398042383. The next prime is 398042417. The reversal of 398042399 is 993240893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398042399 - 24 = 398042383 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 (398042339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149339 + ... + 151980.

It is an arithmetic number, because the mean of its divisors is an integer number (99586260).

Almost surely, 2398042399 is an apocalyptic number.

398042399 is a deficient number, since it is larger than the sum of its proper divisors (302641).

398042399 is a wasteful number, since it uses less digits than its factorization.

398042399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302640.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 398042399 is about 19950.9999498772. Note that the first 4 decimals coincide. The cubic root of 398042399 is about 735.6023562618.

The spelling of 398042399 in words is "three hundred ninety-eight million, forty-two thousand, three hundred ninety-nine".

Divisors: 1 1321 301319 398042399