2520678138 has 32 divisors (see below), whose sum is σ = 5677074432. Its totient is φ = 739201200.

The previous prime is 2520678137. The next prime is 2520678151. The reversal of 2520678138 is 8318760252.

It is a super-2 number, since 2×2520678138² = 12707636550782294088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2520678138.

It is not an unprimeable number, because it can be changed into a prime (2520678133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613956 + ... + 618047.

It is an arithmetic number, because the mean of its divisors is an integer number (177408576).

Almost surely, 2^2520678138 is an apocalyptic number.

2520678138 is an abundant number, since it is smaller than the sum of its proper divisors (3156396294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2520678138 is a wasteful number, since it uses less digits than its factorization.

2520678138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232050.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2520678138 is about 50206.3555538539. The cubic root of 2520678138 is about 1360.9404787354.

The spelling of 2520678138 in words is "two billion, five hundred twenty million, six hundred seventy-eight thousand, one hundred thirty-eight".