7378649 has 4 divisors (see below), whose sum is σ = 7384740. Its totient is φ = 7372560.

The previous prime is 7378639. The next prime is 7378661. The reversal of 7378649 is 9468737.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5107600 + 2271049 = 2260^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 7378649 - 2¹⁶ = 7313113 is a prime.

It is a super-2 number, since 2×7378649² = 108888922130402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7378639) 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, 542 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (1846185).

Almost surely, 2^7378649 is an apocalyptic number.

It is an amenable number.

7378649 is a deficient number, since it is larger than the sum of its proper divisors (6091).

7378649 is a wasteful number, since it uses less digits than its factorization.

7378649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090.

The product of its digits is 254016, while the sum is 44.

The square root of 7378649 is about 2716.3668750741. The cubic root of 7378649 is about 194.6819184246.

The spelling of 7378649 in words is "seven million, three hundred seventy-eight thousand, six hundred forty-nine".