245087540 has 48 divisors (see below), whose sum is σ = 538538112. Its totient is φ = 93515136.

The previous prime is 245087489. The next prime is 245087561. The reversal of 245087540 is 45780542.

It is a self number, because there is not a number n which added to its sum of digits gives 245087540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311027 + ... + 311813.

It is an arithmetic number, because the mean of its divisors is an integer number (11219544).

Almost surely, 2^245087540 is an apocalyptic number.

245087540 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 245087540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269269056).

245087540 is an abundant number, since it is smaller than the sum of its proper divisors (293450572).

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

245087540 is a wasteful number, since it uses less digits than its factorization.

245087540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 245087540 is about 15655.2719554788. The cubic root of 245087540 is about 625.8069917079.

The spelling of 245087540 in words is "two hundred forty-five million, eighty-seven thousand, five hundred forty".