7140249978 has 8 divisors (see below), whose sum is σ = 14280499968. Its totient is φ = 2380083324.

The previous prime is 7140249967. The next prime is 7140249979. The reversal of 7140249978 is 8799420417.

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

7140249978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 7140249978.

It is not an unprimeable number, because it can be changed into a prime (7140249979) 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, 595020826 + ... + 595020837.

It is an arithmetic number, because the mean of its divisors is an integer number (1785062496).

Almost surely, 2^7140249978 is an apocalyptic number.

7140249978 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.

7140249978 is a wasteful number, since it uses less digits than its factorization.

7140249978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190041668.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 7140249978 is about 84499.9998698225. Note that the first 3 decimals coincide. The cubic root of 7140249978 is about 1925.6224424871.

The spelling of 7140249978 in words is "seven billion, one hundred forty million, two hundred forty-nine thousand, nine hundred seventy-eight".