398520851 has 8 divisors (see below), whose sum is σ = 426142944. Its totient is φ = 371363200.

The previous prime is 398520827. The next prime is 398520887. The reversal of 398520851 is 158025893.

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

It is a cyclic number.

It is not a de Polignac number, because 398520851 - 2²² = 394326547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398520799 and 398520808.

It is not an unprimeable number, because it can be changed into a prime (398526851) 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, 114335 + ... + 117768.

It is an arithmetic number, because the mean of its divisors is an integer number (53267868).

Almost surely, 2^398520851 is an apocalyptic number.

398520851 is a deficient number, since it is larger than the sum of its proper divisors (27622093).

398520851 is a wasteful number, since it uses less digits than its factorization.

398520851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232221.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 398520851 is about 19962.9870259939. The cubic root of 398520851 is about 735.8969726956.

The spelling of 398520851 in words is "three hundred ninety-eight million, five hundred twenty thousand, eight hundred fifty-one".