1678558460 has 12 divisors (see below), whose sum is σ = 3524972808. Its totient is φ = 671423376.

The previous prime is 1678558421. The next prime is 1678558463. The reversal of 1678558460 is 648558761.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1678558399 and 1678558408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678558463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41963942 + ... + 41963981.

It is an arithmetic number, because the mean of its divisors is an integer number (293747734).

Almost surely, 2^1678558460 is an apocalyptic number.

1678558460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1678558460 is an abundant number, since it is smaller than the sum of its proper divisors (1846414348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1678558460 is a wasteful number, since it uses less digits than its factorization.

1678558460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83927932 (or 83927930 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 50.

The square root of 1678558460 is about 40970.2143025882. The cubic root of 1678558460 is about 1188.4442773322. Note that the first 3 decimals are identical.

The spelling of 1678558460 in words is "one billion, six hundred seventy-eight million, five hundred fifty-eight thousand, four hundred sixty".