245204280 has 128 divisors (see below), whose sum is σ = 845640000. Its totient is φ = 63124992.

The previous prime is 245204273. The next prime is 245204339. The reversal of 245204280 is 82402542.

It is a happy number.

245204280 is a `hidden beast` number, since 24 + 520 + 42 + 80 = 666.

245204280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 15659²-1.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27406 + ... + 35234.

Almost surely, 2^245204280 is an apocalyptic number.

245204280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245204280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422820000).

245204280 is an abundant number, since it is smaller than the sum of its proper divisors (600435720).

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

245204280 is a wasteful number, since it uses less digits than its factorization.

245204280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878 (or 7868 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 245204280 is about 15658.9999680695. Note that the first 4 decimals coincide. The cubic root of 245204280 is about 625.9063373156.

The spelling of 245204280 in words is "two hundred forty-five million, two hundred four thousand, two hundred eighty".