7131644 has 12 divisors (see below), whose sum is σ = 13440504. Its totient is φ = 3291504.

The previous prime is 7131629. The next prime is 7131647. The reversal of 7131644 is 4461317.

It is a super-2 number, since 2×7131644² = 101720692285472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68522 + ... + 68625.

It is an arithmetic number, because the mean of its divisors is an integer number (1120042).

Almost surely, 2^7131644 is an apocalyptic number.

It is an amenable number.

7131644 is a deficient number, since it is larger than the sum of its proper divisors (6308860).

7131644 is a wasteful number, since it uses less digits than its factorization.

7131644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137164 (or 137162 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 7131644 is about 2670.5138082399. The cubic root of 7131644 is about 192.4848495413.

The spelling of 7131644 in words is "seven million, one hundred thirty-one thousand, six hundred forty-four".