245289778 has 8 divisors (see below), whose sum is σ = 371191068. Its totient is φ = 121559424.

The previous prime is 245289773. The next prime is 245289797. The reversal of 245289778 is 877982542.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 171793449 + 73496329 = 13107^2 + 8573^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (245289773) 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, 542451 + ... + 542902.

Almost surely, 2^245289778 is an apocalyptic number.

245289778 is a deficient number, since it is larger than the sum of its proper divisors (125901290).

245289778 is a wasteful number, since it uses less digits than its factorization.

245289778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085468.

The product of its digits is 2257920, while the sum is 52.

The square root of 245289778 is about 15661.7297256721. The cubic root of 245289778 is about 625.9790760154.

The spelling of 245289778 in words is "two hundred forty-five million, two hundred eighty-nine thousand, seven hundred seventy-eight".