78303388 has 12 divisors (see below), whose sum is σ = 137100600. Its totient is φ = 39131792.

The previous prime is 78303373. The next prime is 78303391. The reversal of 78303388 is 88330387.

It is a super-3 number, since 3×78303388³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 78303388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7170 + ... + 14422.

It is an arithmetic number, because the mean of its divisors is an integer number (11425050).

Almost surely, 2^78303388 is an apocalyptic number.

It is an amenable number.

78303388 is a deficient number, since it is larger than the sum of its proper divisors (58797212).

78303388 is a wasteful number, since it uses less digits than its factorization.

78303388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956 (or 9954 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 78303388 is about 8848.9201601099. The cubic root of 78303388 is about 427.8191144678.

The spelling of 78303388 in words is "seventy-eight million, three hundred three thousand, three hundred eighty-eight".