398786925 has 48 divisors (see below), whose sum is σ = 682938432. Its totient is φ = 205171200.

The previous prime is 398786909. The next prime is 398786929. The reversal of 398786925 is 529687893.

It is not a de Polignac number, because 398786925 - 2⁴ = 398786909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398786929) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362977 + ... + 364073.

It is an arithmetic number, because the mean of its divisors is an integer number (14227884).

Almost surely, 2^398786925 is an apocalyptic number.

It is an amenable number.

398786925 is a deficient number, since it is larger than the sum of its proper divisors (284151507).

398786925 is a wasteful number, since it uses less digits than its factorization.

398786925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1273 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The square root of 398786925 is about 19969.6500970848. The cubic root of 398786925 is about 736.0607110885.

The spelling of 398786925 in words is "three hundred ninety-eight million, seven hundred eighty-six thousand, nine hundred twenty-five".