98821690 has 32 divisors (see below), whose sum is σ = 194482944. Its totient is φ = 35855040.

The previous prime is 98821661. The next prime is 98821691. The reversal of 98821690 is 9612889.

It is a happy number.

It is a super-2 number, since 2×98821690² = 19531452828912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (98821691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73807 + ... + 75133.

It is an arithmetic number, because the mean of its divisors is an integer number (6077592).

Almost surely, 2^98821690 is an apocalyptic number.

98821690 is a deficient number, since it is larger than the sum of its proper divisors (95661254).

98821690 is a wasteful number, since it uses less digits than its factorization.

98821690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 98821690 is about 9940.9099181111. The cubic root of 98821690 is about 462.3285987709.

The spelling of 98821690 in words is "ninety-eight million, eight hundred twenty-one thousand, six hundred ninety".