78389284 has 12 divisors (see below), whose sum is σ = 137872000. Its totient is φ = 38997288.

The previous prime is 78389281. The next prime is 78389303. The reversal of 78389284 is 48298387.

It is a super-3 number, since 3×78389284³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78389281) 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, 48444 + ... + 50035.

Almost surely, 2^78389284 is an apocalyptic number.

It is an amenable number.

78389284 is a deficient number, since it is larger than the sum of its proper divisors (59482716).

78389284 is a wasteful number, since it uses less digits than its factorization.

78389284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98682 (or 98680 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 78389284 is about 8853.7723033744. The cubic root of 78389284 is about 427.9754913616.

The spelling of 78389284 in words is "seventy-eight million, three hundred eighty-nine thousand, two hundred eighty-four".