396238881 has 4 divisors (see below), whose sum is σ = 528318512. Its totient is φ = 264159252.

The previous prime is 396238853. The next prime is 396238903. The reversal of 396238881 is 188832693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 396238881 - 2⁵ = 396238849 is a prime.

It is a super-2 number, since 2×396238881² = 314010501632264322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396238881.

It is not an unprimeable number, because it can be changed into a prime (396238831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66039811 + ... + 66039816.

It is an arithmetic number, because the mean of its divisors is an integer number (132079628).

Almost surely, 2^396238881 is an apocalyptic number.

It is an amenable number.

396238881 is a deficient number, since it is larger than the sum of its proper divisors (132079631).

396238881 is a wasteful number, since it uses less digits than its factorization.

396238881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132079630.

The product of its digits is 497664, while the sum is 48.

The square root of 396238881 is about 19905.7499481934. The cubic root of 396238881 is about 734.4896767613.

The spelling of 396238881 in words is "three hundred ninety-six million, two hundred thirty-eight thousand, eight hundred eighty-one".