245109620 has 96 divisors (see below), whose sum is σ = 618928128. Its totient is φ = 79719552.

The previous prime is 245109617. The next prime is 245109629. The reversal of 245109620 is 26901542.

It is a happy number.

245109620 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 not an unprimeable number, because it can be changed into a prime (245109629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524627 + ... + 525093.

It is an arithmetic number, because the mean of its divisors is an integer number (6447168).

Almost surely, 2^245109620 is an apocalyptic number.

245109620 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 245109620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309464064).

245109620 is an abundant number, since it is smaller than the sum of its proper divisors (373818508).

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

245109620 is a wasteful number, since it uses less digits than its factorization.

245109620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 245109620 is about 15655.9771333507. The cubic root of 245109620 is about 625.8257841816.

The spelling of 245109620 in words is "two hundred forty-five million, one hundred nine thousand, six hundred twenty".