7240387 has 32 divisors (see below), whose sum is σ = 9792000. Its totient is φ = 5292000.

The previous prime is 7240381. The next prime is 7240393. The reversal of 7240387 is 7830427.

It is an interprime number because it is at equal distance from previous prime (7240381) and next prime (7240393).

It is not a de Polignac number, because 7240387 - 2¹¹ = 7238339 is a prime.

It is a Duffinian number.

7240387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7240381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71637 + ... + 71737.

It is an arithmetic number, because the mean of its divisors is an integer number (306000).

Almost surely, 2^7240387 is an apocalyptic number.

7240387 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7240387 is a deficient number, since it is larger than the sum of its proper divisors (2551613).

7240387 is a wasteful number, since it uses less digits than its factorization.

7240387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 7240387 is about 2690.7967221624. The cubic root of 7240387 is about 193.4582522715.

The spelling of 7240387 in words is "seven million, two hundred forty thousand, three hundred eighty-seven".