7197820 has 24 divisors (see below), whose sum is σ = 17275104. Its totient is φ = 2467776.

The previous prime is 7197809. The next prime is 7197833. The reversal of 7197820 is 287917.

It is a super-2 number, since 2×7197820² = 103617225504800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25567 + ... + 25846.

It is an arithmetic number, because the mean of its divisors is an integer number (719796).

Almost surely, 2^7197820 is an apocalyptic number.

7197820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7197820 is an abundant number, since it is smaller than the sum of its proper divisors (10077284).

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

7197820 is a wasteful number, since it uses less digits than its factorization.

7197820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51429 (or 51427 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 7197820 is about 2682.8753232307. The cubic root of 7197820 is about 193.0783863719.

Subtracting from 7197820 its reverse (287917), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 7197820 in words is "seven million, one hundred ninety-seven thousand, eight hundred twenty".