870634642 has 32 divisors (see below), whose sum is σ = 1365537600. Its totient is φ = 415948608.

The previous prime is 870634637. The next prime is 870634673. The reversal of 870634642 is 246436078.

It is a happy number.

870634642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 870634595 and 870634604.

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, 1406209 + ... + 1406827.

It is an arithmetic number, because the mean of its divisors is an integer number (42673050).

Almost surely, 2^870634642 is an apocalyptic number.

870634642 is a deficient number, since it is larger than the sum of its proper divisors (494902958).

870634642 is a wasteful number, since it uses less digits than its factorization.

870634642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 870634642 is about 29506.5186357184. The cubic root of 870634642 is about 954.8723427951.

The spelling of 870634642 in words is "eight hundred seventy million, six hundred thirty-four thousand, six hundred forty-two".