1678604381 has 8 divisors (see below), whose sum is σ = 1775330400. Its totient is φ = 1582716240.

The previous prime is 1678604371. The next prime is 1678604387. The reversal of 1678604381 is 1834068761.

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

It is a cyclic number.

It is not a de Polignac number, because 1678604381 - 2¹⁰ = 1678603357 is a prime.

It is a super-2 number, since 2×1678604381² = 5635425335824786322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678604387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205346 + ... + 213363.

It is an arithmetic number, because the mean of its divisors is an integer number (221916300).

Almost surely, 2^1678604381 is an apocalyptic number.

It is an amenable number.

1678604381 is a deficient number, since it is larger than the sum of its proper divisors (96726019).

1678604381 is a wasteful number, since it uses less digits than its factorization.

1678604381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418939.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1678604381 is about 40970.7747180841. The cubic root of 1678604381 is about 1188.4551148164.

The spelling of 1678604381 in words is "one billion, six hundred seventy-eight million, six hundred four thousand, three hundred eighty-one".