402848638 has 4 divisors (see below), whose sum is σ = 604272960. Its totient is φ = 201424318.

The previous prime is 402848603. The next prime is 402848647. The reversal of 402848638 is 836848204.

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

It is a junction number, because it is equal to n+sod(n) for n = 402848594 and 402848603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100712158 + ... + 100712161.

It is an arithmetic number, because the mean of its divisors is an integer number (151068240).

Almost surely, 2^402848638 is an apocalyptic number.

402848638 is a deficient number, since it is larger than the sum of its proper divisors (201424322).

402848638 is a wasteful number, since it uses less digits than its factorization.

402848638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201424321.

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 402848638 is about 20071.0896066955. The cubic root of 402848638 is about 738.5512426880.

The spelling of 402848638 in words is "four hundred two million, eight hundred forty-eight thousand, six hundred thirty-eight".