2540007138 has 8 divisors (see below), whose sum is σ = 5080014288. Its totient is φ = 846669044.

The previous prime is 2540007133. The next prime is 2540007149. The reversal of 2540007138 is 8317000452.

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

2540007138 is an admirable number.

It is a super-2 number, since 2×2540007138² = 12903272522181902088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2540007133) 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, 211667256 + ... + 211667267.

It is an arithmetic number, because the mean of its divisors is an integer number (635001786).

Almost surely, 2^2540007138 is an apocalyptic number.

2540007138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2540007138 is a wasteful number, since it uses less digits than its factorization.

2540007138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423334528.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2540007138 is about 50398.4834890892. The cubic root of 2540007138 is about 1364.4102678652.

The spelling of 2540007138 in words is "two billion, five hundred forty million, seven thousand, one hundred thirty-eight".