78145282 has 4 divisors (see below), whose sum is σ = 117217926. Its totient is φ = 39072640.

The previous prime is 78145279. The next prime is 78145313. The reversal of 78145282 is 28254187.

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., 77810041 + 335241 = 8821^2 + 579^2 .

It is a super-2 number, since 2×78145282² = 12213370197719048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19536319 + ... + 19536322.

Almost surely, 2^78145282 is an apocalyptic number.

78145282 is a deficient number, since it is larger than the sum of its proper divisors (39072644).

78145282 is a wasteful number, since it uses less digits than its factorization.

78145282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39072643.

The product of its digits is 35840, while the sum is 37.

The square root of 78145282 is about 8839.9820135564. The cubic root of 78145282 is about 427.5309773159.

The spelling of 78145282 in words is "seventy-eight million, one hundred forty-five thousand, two hundred eighty-two".