1678493052 has 18 divisors (see below), whose sum is σ = 4242857528. Its totient is φ = 559497672.

The previous prime is 1678493029. The next prime is 1678493077. The reversal of 1678493052 is 2503948761.

1678493052 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1678493052² = 5634677851224549408, which contains 22 as substring.

1678493052 is strictly pandigital in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1678492989 and 1678493007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23312368 + ... + 23312439.

It is a 1-persistent number, because it is pandigital, but 2⋅1678493052 = 3356986104 is not.

Almost surely, 2^1678493052 is an apocalyptic number.

1678493052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1678493052 is an abundant number, since it is smaller than the sum of its proper divisors (2564364476).

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

1678493052 is a wasteful number, since it uses less digits than its factorization.

1678493052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46624817 (or 46624812 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1678493052 is about 40969.4160563706. The cubic root of 1678493052 is about 1188.4288405205.

The spelling of 1678493052 in words is "one billion, six hundred seventy-eight million, four hundred ninety-three thousand, fifty-two".