878063642 has 4 divisors (see below), whose sum is σ = 1317095466. Its totient is φ = 439031820.

The previous prime is 878063621. The next prime is 878063657. The reversal of 878063642 is 246360878.

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., 651831961 + 226231681 = 25531^2 + 15041^2 .

It is a junction number, because it is equal to n+sod(n) for n = 878063593 and 878063602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219515909 + ... + 219515912.

Almost surely, 2^878063642 is an apocalyptic number.

878063642 is a deficient number, since it is larger than the sum of its proper divisors (439031824).

878063642 is a wasteful number, since it uses less digits than its factorization.

878063642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439031823.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 878063642 is about 29632.1386673321. The cubic root of 878063642 is about 957.5805837188.

The spelling of 878063642 in words is "eight hundred seventy-eight million, sixty-three thousand, six hundred forty-two".