98780690 has 8 divisors (see below), whose sum is σ = 177805260. Its totient is φ = 39512272.

The previous prime is 98780657. The next prime is 98780719. The reversal of 98780690 is 9608789.

It can be written as a sum of positive squares in 2 ways, for example, as 83484769 + 15295921 = 9137^2 + 3911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×98780690² = 19515249433752200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4939025 + ... + 4939044.

Almost surely, 2^98780690 is an apocalyptic number.

98780690 is a deficient number, since it is larger than the sum of its proper divisors (79024570).

98780690 is a wasteful number, since it uses less digits than its factorization.

98780690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9878076.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 98780690 is about 9938.8475187016. The cubic root of 98780690 is about 462.2646516266.

The spelling of 98780690 in words is "ninety-eight million, seven hundred eighty thousand, six hundred ninety".