2506780438 has 8 divisors (see below), whose sum is σ = 3840174432. Its totient is φ = 1226722296.

The previous prime is 2506780429. The next prime is 2506780489. The reversal of 2506780438 is 8340876052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2506780394 and 2506780403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13333845 + ... + 13334032.

It is an arithmetic number, because the mean of its divisors is an integer number (480021804).

Almost surely, 2^2506780438 is an apocalyptic number.

2506780438 is a deficient number, since it is larger than the sum of its proper divisors (1333393994).

2506780438 is a wasteful number, since it uses less digits than its factorization.

2506780438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26667926.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 2506780438 is about 50067.7584679003. The cubic root of 2506780438 is about 1358.4346967135.

The spelling of 2506780438 in words is "two billion, five hundred six million, seven hundred eighty thousand, four hundred thirty-eight".