7540407838 has 8 divisors (see below), whose sum is σ = 11524019688. Its totient is φ = 3699067944.

The previous prime is 7540407779. The next prime is 7540407839. The reversal of 7540407838 is 8387040457.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540407839) 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, 35567856 + ... + 35568067.

It is an arithmetic number, because the mean of its divisors is an integer number (1440502461).

Almost surely, 2^7540407838 is an apocalyptic number.

7540407838 is a deficient number, since it is larger than the sum of its proper divisors (3983611850).

7540407838 is a wasteful number, since it uses less digits than its factorization.

7540407838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71135978.

The product of its (nonzero) digits is 752640, while the sum is 46.

The square root of 7540407838 is about 86835.5217523336. The cubic root of 7540407838 is about 1960.9428892134.

The spelling of 7540407838 in words is "seven billion, five hundred forty million, four hundred seven thousand, eight hundred thirty-eight".