7140388 has 6 divisors (see below), whose sum is σ = 12495686. Its totient is φ = 3570192.

The previous prime is 7140383. The next prime is 7140401. The reversal of 7140388 is 8830417.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 338724 = 2608^2 + 582^2 .

It is not an unprimeable number, because it can be changed into a prime (7140383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892545 + ... + 892552.

Almost surely, 2^7140388 is an apocalyptic number.

It is an amenable number.

7140388 is a deficient number, since it is larger than the sum of its proper divisors (5355298).

7140388 is a wasteful number, since it uses less digits than its factorization.

7140388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785101 (or 1785099 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 7140388 is about 2672.1504448665. The cubic root of 7140388 is about 192.5634849921.

The spelling of 7140388 in words is "seven million, one hundred forty thousand, three hundred eighty-eight".