881978 has 4 divisors (see below), whose sum is σ = 1322970. Its totient is φ = 440988.

The previous prime is 881963. The next prime is 881983. The reversal of 881978 is 879188.

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., 644809 + 237169 = 803^2 + 487^2 .

It is an unprimeable number.

881978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220493 + ... + 220496.

2⁸⁸¹⁹⁷⁸ is an apocalyptic number.

881978 is a deficient number, since it is larger than the sum of its proper divisors (440992).

881978 is a wasteful number, since it uses less digits than its factorization.

881978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440991.

The product of its digits is 32256, while the sum is 41.

The square root of 881978 is about 939.1368377398. The cubic root of 881978 is about 95.9001421143.

The spelling of 881978 in words is "eight hundred eighty-one thousand, nine hundred seventy-eight".