78789098 has 4 divisors (see below), whose sum is σ = 118183650. Its totient is φ = 39394548.

The previous prime is 78789091. The next prime is 78789103. The reversal of 78789098 is 89098787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50027329 + 28761769 = 7073^2 + 5363^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78789091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19697273 + ... + 19697276.

Almost surely, 2^78789098 is an apocalyptic number.

78789098 is a deficient number, since it is larger than the sum of its proper divisors (39394552).

78789098 is a wasteful number, since it uses less digits than its factorization.

78789098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39394551.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 78789098 is about 8876.3223240259. The cubic root of 78789098 is about 428.7018683060.

The spelling of 78789098 in words is "seventy-eight million, seven hundred eighty-nine thousand, ninety-eight".