1878789025 has 9 divisors (see below), whose sum is σ = 2329967161. Its totient is φ = 1502857840.

The previous prime is 1878788993. The next prime is 1878789037. The reversal of 1878789025 is 5209878781.

The square root of 1878789025 is 43345.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 72199009 + 1806590016 = 8497^2 + 42504^2 .

It is not a de Polignac number, because 1878789025 - 2⁵ = 1878788993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 212391 + ... + 221059.

Almost surely, 2^1878789025 is an apocalyptic number.

1878789025 is the 43345-th square number.

1878789025 is the 21673-rd centered octagonal number.

It is an amenable number.

1878789025 is a deficient number, since it is larger than the sum of its proper divisors (451178136).

1878789025 is an frugal number, since it uses more digits than its factorization.

1878789025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17348 (or 8674 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 55.

The cubic root of 1878789025 is about 1233.9361039865.

The spelling of 1878789025 in words is "one billion, eight hundred seventy-eight million, seven hundred eighty-nine thousand, twenty-five".