7881020 has 48 divisors (see below), whose sum is σ = 19389888. Its totient is φ = 2634240.

The previous prime is 7880989. The next prime is 7881023. The reversal of 7881020 is 201887.

It is a super-2 number, since 2×7881020² = 124220952480800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881023) 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, 5054 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (403956).

Almost surely, 2^7881020 is an apocalyptic number.

7881020 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 7881020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9694944).

7881020 is an abundant number, since it is smaller than the sum of its proper divisors (11508868).

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

7881020 is a wasteful number, since it uses less digits than its factorization.

7881020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 7881020 is about 2807.3154436223. The cubic root of 7881020 is about 199.0035436185.

It can be divided in two parts, 78810 and 20, that multiplied together give a triangular number (1576200 = T₁₇₇₅).

The spelling of 7881020 in words is "seven million, eight hundred eighty-one thousand, twenty".