8398525440 has 176 divisors, whose sum is σ = 28031257728. Its totient is φ = 2142142464.

The previous prime is 8398525439. The next prime is 8398525459. The reversal of 8398525440 is 445258938.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 8398525440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341394 + ... + 365166.

Almost surely, 2^8398525440 is an apocalyptic number.

8398525440 is a gapful number since it is divisible by the number (80) 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 8398525440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14015628864).

8398525440 is an abundant number, since it is smaller than the sum of its proper divisors (19632732288).

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

8398525440 is a wasteful number, since it uses less digits than its factorization.

8398525440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23824 (or 23806 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The square root of 8398525440 is about 91643.4691617466. The cubic root of 8398525440 is about 2032.6737592553.

The spelling of 8398525440 in words is "eight billion, three hundred ninety-eight million, five hundred twenty-five thousand, four hundred forty".