78744098 has 4 divisors (see below), whose sum is σ = 118116150. Its totient is φ = 39372048.

The previous prime is 78744097. The next prime is 78744109. The reversal of 78744098 is 89044787.

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., 78623689 + 120409 = 8867^2 + 347^2 .

It is not an unprimeable number, because it can be changed into a prime (78744097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19686023 + ... + 19686026.

Almost surely, 2^78744098 is an apocalyptic number.

78744098 is a deficient number, since it is larger than the sum of its proper divisors (39372052).

78744098 is a wasteful number, since it uses less digits than its factorization.

78744098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39372051.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78744098 is about 8873.7871283911. The cubic root of 78744098 is about 428.6202357854.

The spelling of 78744098 in words is "seventy-eight million, seven hundred forty-four thousand, ninety-eight".