245240690 has 16 divisors (see below), whose sum is σ = 455673600. Its totient is φ = 94931760.

The previous prime is 245240687. The next prime is 245240713. The reversal of 245240690 is 96042542.

It is a super-2 number, since 2×245240690² = 120285992063352200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395240 + ... + 395859.

It is an arithmetic number, because the mean of its divisors is an integer number (28479600).

Almost surely, 2^245240690 is an apocalyptic number.

245240690 is a deficient number, since it is larger than the sum of its proper divisors (210432910).

245240690 is a wasteful number, since it uses less digits than its factorization.

245240690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791137.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 245240690 is about 15660.1625151210. The cubic root of 245240690 is about 625.9373157334.

The spelling of 245240690 in words is "two hundred forty-five million, two hundred forty thousand, six hundred ninety".