2520643398 has 192 divisors, whose sum is σ = 6732311040. Its totient is φ = 621831168.

The previous prime is 2520643369. The next prime is 2520643399. The reversal of 2520643398 is 8933460252.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520643399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7479486 + ... + 7479822.

It is an arithmetic number, because the mean of its divisors is an integer number (35064120).

Almost surely, 2^2520643398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2520643398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3366155520).

2520643398 is an abundant number, since it is smaller than the sum of its proper divisors (4211667642).

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

2520643398 is a wasteful number, since it uses less digits than its factorization.

2520643398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 2520643398 is about 50206.0095805273. The cubic root of 2520643398 is about 1360.9342265436.

The spelling of 2520643398 in words is "two billion, five hundred twenty million, six hundred forty-three thousand, three hundred ninety-eight".