78270002 has 4 divisors (see below), whose sum is σ = 117405006. Its totient is φ = 39135000.

The previous prime is 78269999. The next prime is 78270007. The reversal of 78270002 is 20007287.

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., 68541841 + 9728161 = 8279^2 + 3119^2 .

It is a super-2 number, since 2×78270002² = 12252386426160008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78270007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19567499 + ... + 19567502.

Almost surely, 2^78270002 is an apocalyptic number.

78270002 is a deficient number, since it is larger than the sum of its proper divisors (39135004).

78270002 is a wasteful number, since it uses less digits than its factorization.

78270002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39135003.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 78270002 is about 8847.0335141221. The cubic root of 78270002 is about 427.7583031382.

Adding to 78270002 its reverse (20007287), we get a palindrome (98277289).

The spelling of 78270002 in words is "seventy-eight million, two hundred seventy thousand, two".