7840980 has 144 divisors (see below), whose sum is σ = 27955200. Its totient is φ = 1778112.

The previous prime is 7840969. The next prime is 7840981. The reversal of 7840980 is 890487.

It is a super-2 number, since 2×7840980² = 122961934720800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840981) 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 47 ways as a sum of consecutive naturals, for example, 61677 + ... + 61803.

Almost surely, 2^7840980 is an apocalyptic number.

7840980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7840980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13977600).

7840980 is an abundant number, since it is smaller than the sum of its proper divisors (20114220).

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

7840980 is a wasteful number, since it uses less digits than its factorization.

7840980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7840980 is about 2800.1749945316. The cubic root of 7840980 is about 198.6659547342.

The spelling of 7840980 in words is "seven million, eight hundred forty thousand, nine hundred eighty".