7404399 has 8 divisors (see below), whose sum is σ = 10969520. Its totient is φ = 4936248.

The previous prime is 7404389. The next prime is 7404409. The reversal of 7404399 is 9934047.

It is an interprime number because it is at equal distance from previous prime (7404389) and next prime (7404409).

It is not a de Polignac number, because 7404399 - 2⁹ = 7403887 is a prime.

It is a Duffinian number.

7404399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7404359) 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, 137092 + ... + 137145.

It is an arithmetic number, because the mean of its divisors is an integer number (1371190).

Almost surely, 2^7404399 is an apocalyptic number.

7404399 is a deficient number, since it is larger than the sum of its proper divisors (3565121).

7404399 is a wasteful number, since it uses less digits than its factorization.

7404399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274246 (or 274240 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 7404399 is about 2721.1025339006. The cubic root of 7404399 is about 194.9081223976.

The spelling of 7404399 in words is "seven million, four hundred four thousand, three hundred ninety-nine".