2628293957 has 4 divisors (see below), whose sum is σ = 2628487980. Its totient is φ = 2628099936.

The previous prime is 2628293953. The next prime is 2628293981. The reversal of 2628293957 is 7593928262.

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 1583323681 + 1044970276 = 39791^2 + 32326^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628293957 - 2² = 2628293953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2628293899 and 2628293908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628293953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75032 + ... + 104337.

It is an arithmetic number, because the mean of its divisors is an integer number (657121995).

Almost surely, 2^2628293957 is an apocalyptic number.

It is an amenable number.

2628293957 is a deficient number, since it is larger than the sum of its proper divisors (194023).

2628293957 is a wasteful number, since it uses less digits than its factorization.

2628293957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194022.

The product of its digits is 3265920, while the sum is 53.

The square root of 2628293957 is about 51266.8894804434. The cubic root of 2628293957 is about 1380.0388487628.

The spelling of 2628293957 in words is "two billion, six hundred twenty-eight million, two hundred ninety-three thousand, nine hundred fifty-seven".