245297890 has 8 divisors (see below), whose sum is σ = 441536220. Its totient is φ = 98119152.

The previous prime is 245297873. The next prime is 245297933. The reversal of 245297890 is 98792542.

It can be written as a sum of positive squares in 2 ways, for example, as 244703449 + 594441 = 15643^2 + 771^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 245297890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12264885 + ... + 12264904.

Almost surely, 2^245297890 is an apocalyptic number.

245297890 is a deficient number, since it is larger than the sum of its proper divisors (196238330).

245297890 is a wasteful number, since it uses less digits than its factorization.

245297890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24529796.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 245297890 is about 15661.9886987573. The cubic root of 245297890 is about 625.9859765425.

The spelling of 245297890 in words is "two hundred forty-five million, two hundred ninety-seven thousand, eight hundred ninety".