7138940 has 12 divisors (see below), whose sum is σ = 14991816. Its totient is φ = 2855568.

The previous prime is 7138931. The next prime is 7138949. The reversal of 7138940 is 498317.

It is an interprime number because it is at equal distance from previous prime (7138931) and next prime (7138949).

It is a junction number, because it is equal to n+sod(n) for n = 7138897 and 7138906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138949) 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, 178454 + ... + 178493.

It is an arithmetic number, because the mean of its divisors is an integer number (1249318).

Almost surely, 2^7138940 is an apocalyptic number.

It is an amenable number.

7138940 is an abundant number, since it is smaller than the sum of its proper divisors (7852876).

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

7138940 is a wasteful number, since it uses less digits than its factorization.

7138940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356956 (or 356954 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 7138940 is about 2671.8794883003. The cubic root of 7138940 is about 192.5504674560.

The spelling of 7138940 in words is "seven million, one hundred thirty-eight thousand, nine hundred forty".