2028401678 has 4 divisors (see below), whose sum is σ = 3042602520. Its totient is φ = 1014200838.

The previous prime is 2028401657. The next prime is 2028401681. The reversal of 2028401678 is 8761048202.

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

It is a super-2 number, since 2×2028401678² = 8228826734626431368, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507100418 + ... + 507100421.

It is an arithmetic number, because the mean of its divisors is an integer number (760650630).

Almost surely, 2^2028401678 is an apocalyptic number.

2028401678 is a deficient number, since it is larger than the sum of its proper divisors (1014200842).

2028401678 is a wasteful number, since it uses less digits than its factorization.

2028401678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014200841.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 2028401678 is about 45037.7805625455. The cubic root of 2028401678 is about 1265.8570180275.

The spelling of 2028401678 in words is "two billion, twenty-eight million, four hundred one thousand, six hundred seventy-eight".