398765951 has 8 divisors (see below), whose sum is σ = 401347200. Its totient is φ = 396190872.

The previous prime is 398765879. The next prime is 398765963. The reversal of 398765951 is 159567893.

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 398765951 - 2¹⁴ = 398749567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398765893 and 398765902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398765251) 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, 230576 + ... + 232298.

It is an arithmetic number, because the mean of its divisors is an integer number (50168400).

Almost surely, 2^398765951 is an apocalyptic number.

398765951 is a deficient number, since it is larger than the sum of its proper divisors (2581249).

398765951 is a wasteful number, since it uses less digits than its factorization.

398765951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085.

The product of its digits is 2041200, while the sum is 53.

The square root of 398765951 is about 19969.1249432718. The cubic root of 398765951 is about 736.0478066133.

The spelling of 398765951 in words is "three hundred ninety-eight million, seven hundred sixty-five thousand, nine hundred fifty-one".