678465381 has 8 divisors (see below), whose sum is σ = 986858784. Its totient is φ = 411191120.

The previous prime is 678465371. The next prime is 678465401. The reversal of 678465381 is 183564876.

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 678465381 - 2⁹ = 678464869 is a prime.

It is a super-2 number, since 2×678465381² = 920630546430950322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 678465381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678465301) 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, 10279746 + ... + 10279811.

It is an arithmetic number, because the mean of its divisors is an integer number (123357348).

Almost surely, 2^678465381 is an apocalyptic number.

It is an amenable number.

678465381 is a deficient number, since it is larger than the sum of its proper divisors (308393403).

678465381 is a wasteful number, since it uses less digits than its factorization.

678465381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20559571.

The product of its digits is 967680, while the sum is 48.

The square root of 678465381 is about 26047.3680244281. The cubic root of 678465381 is about 878.7039206474.

The spelling of 678465381 in words is "six hundred seventy-eight million, four hundred sixty-five thousand, three hundred eighty-one".