268402642 has 4 divisors (see below), whose sum is σ = 402603966. Its totient is φ = 134201320.

The previous prime is 268402633. The next prime is 268402657. The reversal of 268402642 is 246204862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 255072841 + 13329801 = 15971^2 + 3651^2 .

It is a junction number, because it is equal to n+sod(n) for n = 268402598 and 268402607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67100659 + ... + 67100662.

Almost surely, 2^268402642 is an apocalyptic number.

268402642 is a deficient number, since it is larger than the sum of its proper divisors (134201324).

268402642 is a wasteful number, since it uses less digits than its factorization.

268402642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134201323.

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 268402642 is about 16382.9985655862. The cubic root of 268402642 is about 645.0532912722.

The spelling of 268402642 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred forty-two".