1678488387 has 16 divisors (see below), whose sum is σ = 2433677472. Its totient is φ = 1024704000.

The previous prime is 1678488377. The next prime is 1678488389. The reversal of 1678488387 is 7838848761.

It is not a de Polignac number, because 1678488387 - 2¹⁵ = 1678455619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1678488387.

It is not an unprimeable number, because it can be changed into a prime (1678488389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442864 + ... + 446637.

It is an arithmetic number, because the mean of its divisors is an integer number (152104842).

Almost surely, 2^1678488387 is an apocalyptic number.

1678488387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1678488387 is a deficient number, since it is larger than the sum of its proper divisors (755189085).

1678488387 is a wasteful number, since it uses less digits than its factorization.

1678488387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889558.

The product of its digits is 14450688, while the sum is 60.

The square root of 1678488387 is about 40969.3591236182. The cubic root of 1678488387 is about 1188.4277395278.

The spelling of 1678488387 in words is "one billion, six hundred seventy-eight million, four hundred eighty-eight thousand, three hundred eighty-seven".