245115990 has 128 divisors (see below), whose sum is σ = 761425920. Its totient is φ = 54946944.

The previous prime is 245115989. The next prime is 245116021. The reversal of 245115990 is 99511542.

245115990 is a `hidden beast` number, since 2 + 4 + 511 + 59 + 90 = 666.

245115990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98947 + ... + 101393.

It is an arithmetic number, because the mean of its divisors is an integer number (5948640).

Almost surely, 2^245115990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245115990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380712960).

245115990 is an abundant number, since it is smaller than the sum of its proper divisors (516309930).

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

245115990 is a wasteful number, since it uses less digits than its factorization.

245115990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 245115990 is about 15656.1805687083. The cubic root of 245115990 is about 625.8312055324.

The spelling of 245115990 in words is "two hundred forty-five million, one hundred fifteen thousand, nine hundred ninety".