1878628 has 6 divisors (see below), whose sum is σ = 3287606. Its totient is φ = 939312.

The previous prime is 1878623. The next prime is 1878629. The reversal of 1878628 is 8268781.

It can be written as a sum of positive squares in only one way, i.e., 1065024 + 813604 = 1032^2 + 902^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1878623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234825 + ... + 234832.

2^1878628 is an apocalyptic number.

It is an amenable number.

1878628 is a deficient number, since it is larger than the sum of its proper divisors (1408978).

1878628 is a wasteful number, since it uses less digits than its factorization.

1878628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469661 (or 469659 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 1878628 is about 1370.6305118448. The cubic root of 1878628 is about 123.3900850740.

The spelling of 1878628 in words is "one million, eight hundred seventy-eight thousand, six hundred twenty-eight".