2078388257 has 4 divisors (see below), whose sum is σ = 2267332656. Its totient is φ = 1889443860.

The previous prime is 2078388233. The next prime is 2078388287. The reversal of 2078388257 is 7528838702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2078388257 - 2⁸ = 2078388001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078388287) 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, 94472183 + ... + 94472204.

It is an arithmetic number, because the mean of its divisors is an integer number (566833164).

Almost surely, 2^2078388257 is an apocalyptic number.

It is an amenable number.

2078388257 is a deficient number, since it is larger than the sum of its proper divisors (188944399).

2078388257 is a wasteful number, since it uses less digits than its factorization.

2078388257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188944398.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The square root of 2078388257 is about 45589.3436781009. The cubic root of 2078388257 is about 1276.1710644255.

The spelling of 2078388257 in words is "two billion, seventy-eight million, three hundred eighty-eight thousand, two hundred fifty-seven".