2078432457 has 4 divisors (see below), whose sum is σ = 2771243280. Its totient is φ = 1385621636.

The previous prime is 2078432453. The next prime is 2078432459. The reversal of 2078432457 is 7542348702.

It is a happy number.

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 2078432457 - 2² = 2078432453 is a prime.

It is a super-2 number, since 2×2078432457² = 8639762956622113698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2078432453) 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, 346405407 + ... + 346405412.

It is an arithmetic number, because the mean of its divisors is an integer number (692810820).

Almost surely, 2^2078432457 is an apocalyptic number.

It is an amenable number.

2078432457 is a deficient number, since it is larger than the sum of its proper divisors (692810823).

2078432457 is an equidigital number, since it uses as much as digits as its factorization.

2078432457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692810822.

The product of its (nonzero) digits is 376320, while the sum is 42.

The square root of 2078432457 is about 45589.8284379312. The cubic root of 2078432457 is about 1276.1801109164.

The spelling of 2078432457 in words is "two billion, seventy-eight million, four hundred thirty-two thousand, four hundred fifty-seven".