245642928 has 80 divisors (see below), whose sum is σ = 674394336. Its totient is φ = 76779520.

The previous prime is 245642927. The next prime is 245642933. The reversal of 245642928 is 829246542.

It is a Cunningham number, because it is equal to 15673²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 245642928.

It is not an unprimeable number, because it can be changed into a prime (245642923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375850 + ... + 376502.

Almost surely, 2^245642928 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 245642928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337197168).

245642928 is an abundant number, since it is smaller than the sum of its proper divisors (428751408).

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

245642928 is a wasteful number, since it uses less digits than its factorization.

245642928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1136 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 245642928 is about 15672.9999680980. Note that the first 4 decimals coincide. The cubic root of 245642928 is about 626.2793446833.

The spelling of 245642928 in words is "two hundred forty-five million, six hundred forty-two thousand, nine hundred twenty-eight".