7268987978 has 16 divisors (see below), whose sum is σ = 12584502144. Its totient is φ = 3084435600.

The previous prime is 7268987939. The next prime is 7268987981. The reversal of 7268987978 is 8797898627.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2568950 + ... + 2571777.

It is an arithmetic number, because the mean of its divisors is an integer number (786531384).

Almost surely, 2^7268987978 is an apocalyptic number.

7268987978 is a deficient number, since it is larger than the sum of its proper divisors (5315514166).

7268987978 is a wasteful number, since it uses less digits than its factorization.

7268987978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140837.

The product of its digits is 170698752, while the sum is 71.

The square root of 7268987978 is about 85258.3601648542. The cubic root of 7268987978 is about 1937.1265053097.

The spelling of 7268987978 in words is "seven billion, two hundred sixty-eight million, nine hundred eighty-seven thousand, nine hundred seventy-eight".