870881642 has 8 divisors (see below), whose sum is σ = 1309340676. Its totient is φ = 434434752.

The previous prime is 870881639. The next prime is 870881651. The reversal of 870881642 is 246188078.

It can be written as a sum of positive squares in 2 ways, for example, as 686492401 + 184389241 = 26201^2 + 13579^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 870881593 and 870881602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501953 + ... + 503684.

Almost surely, 2^870881642 is an apocalyptic number.

870881642 is a deficient number, since it is larger than the sum of its proper divisors (438459034).

870881642 is a wasteful number, since it uses less digits than its factorization.

870881642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006072.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 870881642 is about 29510.7038547033. The cubic root of 870881642 is about 954.9626336997.

The spelling of 870881642 in words is "eight hundred seventy million, eight hundred eighty-one thousand, six hundred forty-two".