288625945 has 4 divisors (see below), whose sum is σ = 346351140. Its totient is φ = 230900752.

The previous prime is 288625921. The next prime is 288625957. The reversal of 288625945 is 549526882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549526882 = 2 ⋅274763441.

It can be written as a sum of positive squares in 2 ways, for example, as 80227849 + 208398096 = 8957^2 + 14436^2 .

It is a cyclic number.

It is not a de Polignac number, because 288625945 - 2⁵ = 288625913 is a prime.

It is a super-2 number, since 2×288625945² = 166609872254286050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28862590 + ... + 28862599.

It is an arithmetic number, because the mean of its divisors is an integer number (86587785).

Almost surely, 2^288625945 is an apocalyptic number.

It is an amenable number.

288625945 is a deficient number, since it is larger than the sum of its proper divisors (57725195).

288625945 is an equidigital number, since it uses as much as digits as its factorization.

288625945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57725194.

The product of its digits is 1382400, while the sum is 49.

The square root of 288625945 is about 16988.9948201770. The cubic root of 288625945 is about 660.8635352645.

The spelling of 288625945 in words is "two hundred eighty-eight million, six hundred twenty-five thousand, nine hundred forty-five".