1678869445 has 8 divisors (see below), whose sum is σ = 2197792800. Its totient is φ = 1220995920.

The previous prime is 1678869427. The next prime is 1678869481. The reversal of 1678869445 is 5449688761.

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

It is a de Polignac number, because none of the positive numbers 2^k-1678869445 is a prime.

It is a super-2 number, since 2×1678869445² = 5637205226709216050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1678869445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15262395 + ... + 15262504.

It is an arithmetic number, because the mean of its divisors is an integer number (274724100).

Almost surely, 2^1678869445 is an apocalyptic number.

It is an amenable number.

1678869445 is a deficient number, since it is larger than the sum of its proper divisors (518923355).

1678869445 is a wasteful number, since it uses less digits than its factorization.

1678869445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30524915.

The product of its digits is 11612160, while the sum is 58.

The square root of 1678869445 is about 40974.0093839985. The cubic root of 1678869445 is about 1188.5176667971.

The spelling of 1678869445 in words is "one billion, six hundred seventy-eight million, eight hundred sixty-nine thousand, four hundred forty-five".