245263640 has 32 divisors (see below), whose sum is σ = 565306560. Its totient is φ = 95712000.

The previous prime is 245263633. The next prime is 245263663. The reversal of 245263640 is 46362542.

It is a junction number, because it is equal to n+sod(n) for n = 245263597 and 245263606.

It is a congruent number.

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, 73136 + ... + 76415.

It is an arithmetic number, because the mean of its divisors is an integer number (17665830).

Almost surely, 2^245263640 is an apocalyptic number.

245263640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245263640 is an abundant number, since it is smaller than the sum of its proper divisors (320042920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245263640 is a wasteful number, since it uses less digits than its factorization.

245263640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149603 (or 149599 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 245263640 is about 15660.8952489952. The cubic root of 245263640 is about 625.9568405158.

The spelling of 245263640 in words is "two hundred forty-five million, two hundred sixty-three thousand, six hundred forty".