78089732 has 18 divisors (see below), whose sum is σ = 158968782. Its totient is φ = 33466944.

The previous prime is 78089689. The next prime is 78089747. The reversal of 78089732 is 23798087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 50176 = 8834^2 + 224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199013 + ... + 199404.

It is an arithmetic number, because the mean of its divisors is an integer number (8831599).

Almost surely, 2^78089732 is an apocalyptic number.

It is an amenable number.

78089732 is an abundant number, since it is smaller than the sum of its proper divisors (80879050).

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

78089732 is a wasteful number, since it uses less digits than its factorization.

78089732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398435 (or 398426 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 78089732 is about 8836.8394802667. The cubic root of 78089732 is about 427.4296490598.

The spelling of 78089732 in words is "seventy-eight million, eighty-nine thousand, seven hundred thirty-two".