78089744 has 40 divisors (see below), whose sum is σ = 156989952. Its totient is φ = 37589760.

The previous prime is 78089689. The next prime is 78089747. The reversal of 78089744 is 44798087.

It is not an unprimeable number, because it can be changed into a prime (78089747) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 154997 + ... + 155499.

Almost surely, 2^78089744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78089744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78494976).

78089744 is an abundant number, since it is smaller than the sum of its proper divisors (78900208).

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

78089744 is a wasteful number, since it uses less digits than its factorization.

78089744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78089744 is about 8836.8401592424. The cubic root of 78089744 is about 427.4296709540.

The spelling of 78089744 in words is "seventy-eight million, eighty-nine thousand, seven hundred forty-four".