396683578 has 4 divisors (see below), whose sum is σ = 595025370. Its totient is φ = 198341788.

The previous prime is 396683563. The next prime is 396683597. The reversal of 396683578 is 875386693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875386693 = 23 ⋅38060291.

It can be written as a sum of positive squares in only one way, i.e., 382867489 + 13816089 = 19567^2 + 3717^2 .

It is a super-2 number, since 2×396683578² = 314715722109764168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99170893 + ... + 99170896.

Almost surely, 2^396683578 is an apocalyptic number.

396683578 is a deficient number, since it is larger than the sum of its proper divisors (198341792).

396683578 is a wasteful number, since it uses less digits than its factorization.

396683578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198341791.

The product of its digits is 6531840, while the sum is 55.

The square root of 396683578 is about 19916.9168798788. The cubic root of 396683578 is about 734.7643454503.

The spelling of 396683578 in words is "three hundred ninety-six million, six hundred eighty-three thousand, five hundred seventy-eight".