98531440 has 40 divisors (see below), whose sum is σ = 261813600. Its totient is φ = 33782016.

The previous prime is 98531437. The next prime is 98531449. The reversal of 98531440 is 4413589.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 98531396 and 98531405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98531449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87415 + ... + 88534.

It is an arithmetic number, because the mean of its divisors is an integer number (6545340).

Almost surely, 2^98531440 is an apocalyptic number.

It is an amenable number.

98531440 is an abundant number, since it is smaller than the sum of its proper divisors (163282160).

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

98531440 is a wasteful number, since it uses less digits than its factorization.

98531440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175969 (or 175963 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 98531440 is about 9926.3004185850. The cubic root of 98531440 is about 461.8755185200.

The spelling of 98531440 in words is "ninety-eight million, five hundred thirty-one thousand, four hundred forty".