78051984 has 20 divisors (see below), whose sum is σ = 201634416. Its totient is φ = 26017312.

The previous prime is 78051973. The next prime is 78052003. The reversal of 78051984 is 48915087.

It is a super-3 number, since 3×78051984³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 812994 + ... + 813089.

Almost surely, 2^78051984 is an apocalyptic number.

It is an amenable number.

78051984 is an abundant number, since it is smaller than the sum of its proper divisors (123582432).

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

78051984 is a wasteful number, since it uses less digits than its factorization.

78051984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626094 (or 1626088 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78051984 is about 8834.7033906068. The cubic root of 78051984 is about 427.3607658470.

The spelling of 78051984 in words is "seventy-eight million, fifty-one thousand, nine hundred eighty-four".