245720886 has 16 divisors (see below), whose sum is σ = 508388400. Its totient is φ = 79082528.

The previous prime is 245720869. The next prime is 245720921. The reversal of 245720886 is 688027542.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 705921 + ... + 706268.

It is an arithmetic number, because the mean of its divisors is an integer number (31774275).

Almost surely, 2^245720886 is an apocalyptic number.

245720886 is an abundant number, since it is smaller than the sum of its proper divisors (262667514).

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

245720886 is a wasteful number, since it uses less digits than its factorization.

245720886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412223.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 245720886 is about 15675.4867866998. The cubic root of 245720886 is about 626.3455903263.

The spelling of 245720886 in words is "two hundred forty-five million, seven hundred twenty thousand, eight hundred eighty-six".