403878242 has 8 divisors (see below), whose sum is σ = 605902800. Its totient is φ = 201910644.

The previous prime is 403878217. The next prime is 403878247. The reversal of 403878242 is 242878304.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×403878242² = 326235268722021128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 403878196 and 403878205.

It is not an unprimeable number, because it can be changed into a prime (403878247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19109 + ... + 34247.

It is an arithmetic number, because the mean of its divisors is an integer number (75737850).

Almost surely, 2^403878242 is an apocalyptic number.

403878242 is a deficient number, since it is larger than the sum of its proper divisors (202024558).

403878242 is a wasteful number, since it uses less digits than its factorization.

403878242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28480.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 403878242 is about 20096.7221705431. The cubic root of 403878242 is about 739.1799059417.

The spelling of 403878242 in words is "four hundred three million, eight hundred seventy-eight thousand, two hundred forty-two".