396735538 has 4 divisors (see below), whose sum is σ = 595103310. Its totient is φ = 198367768.

The previous prime is 396735527. The next prime is 396735541. The reversal of 396735538 is 835537693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835537693 = 2063 ⋅405011.

It can be written as a sum of positive squares in only one way, i.e., 212780569 + 183954969 = 14587^2 + 13563^2 .

It is a super-2 number, since 2×396735538² = 314798174224298888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 396735491 and 396735500.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99183883 + ... + 99183886.

Almost surely, 2^396735538 is an apocalyptic number.

396735538 is a deficient number, since it is larger than the sum of its proper divisors (198367772).

396735538 is a wasteful number, since it uses less digits than its factorization.

396735538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198367771.

The product of its digits is 2041200, while the sum is 49.

The square root of 396735538 is about 19918.2212559254. The cubic root of 396735538 is about 734.7964253335.

The spelling of 396735538 in words is "three hundred ninety-six million, seven hundred thirty-five thousand, five hundred thirty-eight".