2028970945 has 4 divisors (see below), whose sum is σ = 2434765140. Its totient is φ = 1623176752.

The previous prime is 2028970913. The next prime is 2028970981. The reversal of 2028970945 is 5490798202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 608510224 + 1420460721 = 24668^2 + 37689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028970945 - 2⁵ = 2028970913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2028970895 and 2028970904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202897090 + ... + 202897099.

It is an arithmetic number, because the mean of its divisors is an integer number (608691285).

Almost surely, 2^2028970945 is an apocalyptic number.

It is an amenable number.

2028970945 is a deficient number, since it is larger than the sum of its proper divisors (405794195).

2028970945 is an equidigital number, since it uses as much as digits as its factorization.

2028970945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405794194.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 2028970945 is about 45044.1000021090. The cubic root of 2028970945 is about 1265.9754270574.

The spelling of 2028970945 in words is "two billion, twenty-eight million, nine hundred seventy thousand, nine hundred forty-five".