245651140 has 96 divisors (see below), whose sum is σ = 618992640. Its totient is φ = 80123904.

The previous prime is 245651129. The next prime is 245651143. The reversal of 245651140 is 41156542.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 245651099 and 245651108.

It is not an unprimeable number, because it can be changed into a prime (245651143) 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 31 ways as a sum of consecutive naturals, for example, 242956 + ... + 243964.

It is an arithmetic number, because the mean of its divisors is an integer number (6447840).

Almost surely, 2^245651140 is an apocalyptic number.

245651140 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 245651140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309496320).

245651140 is an abundant number, since it is smaller than the sum of its proper divisors (373341500).

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

245651140 is a wasteful number, since it uses less digits than its factorization.

245651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 245651140 is about 15673.2619451089. The cubic root of 245651140 is about 626.2863235784.

The spelling of 245651140 in words is "two hundred forty-five million, six hundred fifty-one thousand, one hundred forty".