7838491320 has 144 divisors (see below), whose sum is σ = 28001708280. Its totient is φ = 1900229760.

The previous prime is 7838491319. The next prime is 7838491321. The reversal of 7838491320 is 231948387.

It is an interprime number because it is at equal distance from previous prime (7838491319) and next prime (7838491321).

It is a super-2 number, since 2×7838491320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7838491321) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46414 + ... + 133533.

Almost surely, 2^7838491320 is an apocalyptic number.

It is an amenable number.

7838491320 is an abundant number, since it is smaller than the sum of its proper divisors (20163216960).

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

7838491320 is a wasteful number, since it uses less digits than its factorization.

7838491320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179986 (or 179968 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 7838491320 is about 88535.2546729268. The cubic root of 7838491320 is about 1986.4493404949.

The spelling of 7838491320 in words is "seven billion, eight hundred thirty-eight million, four hundred ninety-one thousand, three hundred twenty".