98155640 has 64 divisors (see below), whose sum is σ = 246849120. Its totient is φ = 34816000.

The previous prime is 98155639. The next prime is 98155657. The reversal of 98155640 is 4655189.

It is a junction number, because it is equal to n+sod(n) for n = 98155594 and 98155603.

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, 15320 + ... + 20760.

Almost surely, 2^98155640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98155640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123424560).

98155640 is an abundant number, since it is smaller than the sum of its proper divisors (148693480).

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

98155640 is a wasteful number, since it uses less digits than its factorization.

98155640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5504 (or 5500 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 98155640 is about 9907.3528250487. The cubic root of 98155640 is about 461.2875709635.

The spelling of 98155640 in words is "ninety-eight million, one hundred fifty-five thousand, six hundred forty".