7137940 has 24 divisors (see below), whose sum is σ = 15198120. Its totient is φ = 2815488.

The previous prime is 7137913. The next prime is 7137947. The reversal of 7137940 is 497317.

It can be written as a sum of positive squares in 4 ways, for example, as 1397124 + 5740816 = 1182^2 + 2396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7137947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (633255).

Almost surely, 2^7137940 is an apocalyptic number.

It is an amenable number.

7137940 is an abundant number, since it is smaller than the sum of its proper divisors (8060180).

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

7137940 is a wasteful number, since it uses less digits than its factorization.

7137940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971 (or 4969 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 7137940 is about 2671.6923475580. The cubic root of 7137940 is about 192.5414764172.

The spelling of 7137940 in words is "seven million, one hundred thirty-seven thousand, nine hundred forty".