7389945 has 24 divisors (see below), whose sum is σ = 12948936. Its totient is φ = 3898368.

The previous prime is 7389929. The next prime is 7389959. The reversal of 7389945 is 5499837.

It can be written as a sum of positive squares in 4 ways, for example, as 404496 + 6985449 = 636^2 + 2643^2 .

It is not a de Polignac number, because 7389945 - 2⁴ = 7389929 is a prime.

It is a super-2 number, since 2×7389945² = 109222574206050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7389945.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3519 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (539539).

Almost surely, 2^7389945 is an apocalyptic number.

It is an amenable number.

7389945 is a deficient number, since it is larger than the sum of its proper divisors (5558991).

7389945 is a wasteful number, since it uses less digits than its factorization.

7389945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1798 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 7389945 is about 2718.4453277563. The cubic root of 7389945 is about 194.7812141849.

The spelling of 7389945 in words is "seven million, three hundred eighty-nine thousand, nine hundred forty-five".