78303830 has 32 divisors (see below), whose sum is σ = 158727168. Its totient is φ = 27554400.

The previous prime is 78303829. The next prime is 78303839. The reversal of 78303830 is 3830387.

It is a super-2 number, since 2×78303830² = 12262979585337800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78303839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8072 + ... + 14891.

It is an arithmetic number, because the mean of its divisors is an integer number (4960224).

Almost surely, 2^78303830 is an apocalyptic number.

78303830 is an abundant number, since it is smaller than the sum of its proper divisors (80423338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78303830 is a wasteful number, since it uses less digits than its factorization.

78303830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23012.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 78303830 is about 8848.9451348734. The cubic root of 78303830 is about 427.8199194380.

The spelling of 78303830 in words is "seventy-eight million, three hundred three thousand, eight hundred thirty".