78730306 has 8 divisors (see below), whose sum is σ = 118193040. Its totient is φ = 39332628.

The previous prime is 78730303. The next prime is 78730307. The reversal of 78730306 is 60303787.

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

It is a super-2 number, since 2×78730306² = 12396922165707272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78730303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13116 + ... + 18151.

It is an arithmetic number, because the mean of its divisors is an integer number (14774130).

Almost surely, 2^78730306 is an apocalyptic number.

78730306 is a deficient number, since it is larger than the sum of its proper divisors (39462734).

78730306 is a wasteful number, since it uses less digits than its factorization.

78730306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32528.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 78730306 is about 8873.0099740731. The cubic root of 78730306 is about 428.5952100983.

The spelling of 78730306 in words is "seventy-eight million, seven hundred thirty thousand, three hundred six".