396284869 has 8 divisors (see below), whose sum is σ = 407472120. Its totient is φ = 385235136.

The previous prime is 396284851. The next prime is 396284893. The reversal of 396284869 is 968482693.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56325025 + 339959844 = 7505^2 + 18438^2 .

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 396284869 - 2²⁵ = 362730437 is a prime.

It is a super-2 number, since 2×396284869² = 314083394796694322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396284809) 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, 28522 + ... + 40075.

It is an arithmetic number, because the mean of its divisors is an integer number (50934015).

Almost surely, 2^396284869 is an apocalyptic number.

It is an amenable number.

396284869 is a deficient number, since it is larger than the sum of its proper divisors (11187251).

396284869 is a wasteful number, since it uses less digits than its factorization.

396284869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68759.

The product of its digits is 4478976, while the sum is 55.

The square root of 396284869 is about 19906.9050582957. The cubic root of 396284869 is about 734.5180909379.

It can be divided in two parts, 3962 and 84869, that added together give a triangular number (88831 = T₄₂₁).

The spelling of 396284869 in words is "three hundred ninety-six million, two hundred eighty-four thousand, eight hundred sixty-nine".