7789948894 has 32 divisors (see below), whose sum is σ = 14845372416. Its totient is φ = 2982324960.

The previous prime is 7789948853. The next prime is 7789948897. The reversal of 7789948894 is 4988499877.

It is a happy number.

It is a super-2 number, since 2×7789948894² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7789948897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684712 + ... + 695995.

It is an arithmetic number, because the mean of its divisors is an integer number (463917888).

Almost surely, 2^7789948894 is an apocalyptic number.

7789948894 is a deficient number, since it is larger than the sum of its proper divisors (7055423522).

7789948894 is a wasteful number, since it uses less digits than its factorization.

7789948894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380760.

The product of its digits is 292626432, while the sum is 73.

The square root of 7789948894 is about 88260.6871375926. The cubic root of 7789948894 is about 1982.3402670386.

The spelling of 7789948894 in words is "seven billion, seven hundred eighty-nine million, nine hundred forty-eight thousand, eight hundred ninety-four".