1878668146 has 4 divisors (see below), whose sum is σ = 2818002222. Its totient is φ = 939334072.

The previous prime is 1878668119. The next prime is 1878668153. The reversal of 1878668146 is 6418668781.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1873937521 + 4730625 = 43289^2 + 2175^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469667035 + ... + 469667038.

Almost surely, 2^1878668146 is an apocalyptic number.

1878668146 is a deficient number, since it is larger than the sum of its proper divisors (939334076).

1878668146 is an equidigital number, since it uses as much as digits as its factorization.

1878668146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939334075.

The product of its digits is 3096576, while the sum is 55.

The square root of 1878668146 is about 43343.6055952894. The cubic root of 1878668146 is about 1233.9096401030.

The spelling of 1878668146 in words is "one billion, eight hundred seventy-eight million, six hundred sixty-eight thousand, one hundred forty-six".