839424642 has 32 divisors (see below), whose sum is σ = 1947328512. Its totient is φ = 236255184.

The previous prime is 839424569. The next prime is 839424659. The reversal of 839424642 is 246424938.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 839424594 and 839424603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146338 + ... + 151965.

It is an arithmetic number, because the mean of its divisors is an integer number (60854016).

Almost surely, 2^839424642 is an apocalyptic number.

839424642 is an abundant number, since it is smaller than the sum of its proper divisors (1107903870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

839424642 is a wasteful number, since it uses less digits than its factorization.

839424642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298382.

The product of its digits is 331776, while the sum is 42.

The square root of 839424642 is about 28972.8259236133. The cubic root of 839424642 is about 943.3233212265.

The spelling of 839424642 in words is "eight hundred thirty-nine million, four hundred twenty-four thousand, six hundred forty-two".