245647728 has 240 divisors, whose sum is σ = 773450496. Its totient is φ = 75271680.

The previous prime is 245647681. The next prime is 245647757. The reversal of 245647728 is 827746542.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3666351 + ... + 3666417.

Almost surely, 2^245647728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245647728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386725248).

245647728 is an abundant number, since it is smaller than the sum of its proper divisors (527802768).

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

245647728 is a wasteful number, since it uses less digits than its factorization.

245647728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 136 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 245647728 is about 15673.1530969362. The cubic root of 245647728 is about 626.2834239395.

The spelling of 245647728 in words is "two hundred forty-five million, six hundred forty-seven thousand, seven hundred twenty-eight".