76320445 has 4 divisors (see below), whose sum is σ = 91584540. Its totient is φ = 61056352.

The previous prime is 76320427. The next prime is 76320449. The reversal of 76320445 is 54402367.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54402367 = 41 ⋅1326887.

It can be written as a sum of positive squares in 2 ways, for example, as 8982009 + 67338436 = 2997^2 + 8206^2 .

It is a cyclic number.

It is not a de Polignac number, because 76320445 - 2⁷ = 76320317 is a prime.

It is a super-3 number, since 3×76320445³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76320449) 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, 7632040 + ... + 7632049.

It is an arithmetic number, because the mean of its divisors is an integer number (22896135).

Almost surely, 2^76320445 is an apocalyptic number.

It is an amenable number.

76320445 is a deficient number, since it is larger than the sum of its proper divisors (15264095).

76320445 is a wasteful number, since it uses less digits than its factorization.

76320445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15264094.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 76320445 is about 8736.1573360374. The cubic root of 76320445 is about 424.1768519539.

The spelling of 76320445 in words is "seventy-six million, three hundred twenty thousand, four hundred forty-five".