7268781078 has 80 divisors (see below), whose sum is σ = 17581687200. Its totient is φ = 2231276544.

The previous prime is 7268781077. The next prime is 7268781109. The reversal of 7268781078 is 8701878627.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7268781077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 941751 + ... + 949437.

It is an arithmetic number, because the mean of its divisors is an integer number (219771090).

Almost surely, 2^7268781078 is an apocalyptic number.

7268781078 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7268781078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8790843600).

7268781078 is an abundant number, since it is smaller than the sum of its proper divisors (10312906122).

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

7268781078 is a wasteful number, since it uses less digits than its factorization.

7268781078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163 (or 8154 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 54.

The square root of 7268781078 is about 85257.1467854748. The cubic root of 7268781078 is about 1937.1081260765.

The spelling of 7268781078 in words is "seven billion, two hundred sixty-eight million, seven hundred eighty-one thousand, seventy-eight".