7440387 has 8 divisors (see below), whose sum is σ = 9984336. Its totient is φ = 4928352.

The previous prime is 7440383. The next prime is 7440397. The reversal of 7440387 is 7830447.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7440387 - 2² = 7440383 is a prime.

7440387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7440383) 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, 7428 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (1248042).

Almost surely, 2^7440387 is an apocalyptic number.

7440387 is a deficient number, since it is larger than the sum of its proper divisors (2543949).

7440387 is a wasteful number, since it uses less digits than its factorization.

7440387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15957.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 7440387 is about 2727.7072790166. The cubic root of 7440387 is about 195.2233863379.

The spelling of 7440387 in words is "seven million, four hundred forty thousand, three hundred eighty-seven".