6871620 has 48 divisors (see below), whose sum is σ = 21990528. Its totient is φ = 1570560.

The previous prime is 6871583. The next prime is 6871639. The reversal of 6871620 is 261786.

It is a happy number.

It is a super-2 number, since 2×6871620² = 94438322848800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7761 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (458136).

Almost surely, 2^6871620 is an apocalyptic number.

6871620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6871620 is an abundant number, since it is smaller than the sum of its proper divisors (15118908).

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

6871620 is a wasteful number, since it uses less digits than its factorization.

6871620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16380 (or 16378 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 6871620 is about 2621.3775004757. The cubic root of 6871620 is about 190.1164567680.

The spelling of 6871620 in words is "six million, eight hundred seventy-one thousand, six hundred twenty".