78473772 has 120 divisors (see below), whose sum is σ = 228432512. Its totient is φ = 23328000.

The previous prime is 78473771. The next prime is 78473783. The reversal of 78473772 is 27737487.

It is not an unprimeable number, because it can be changed into a prime (78473771) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 130272 + ... + 130872.

Almost surely, 2^78473772 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 78473772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114216256).

78473772 is an abundant number, since it is smaller than the sum of its proper divisors (149958740).

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

78473772 is a wasteful number, since it uses less digits than its factorization.

78473772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 650 counting only the distinct ones).

The product of its digits is 460992, while the sum is 45.

The square root of 78473772 is about 8858.5423180115. The cubic root of 78473772 is about 428.1291935370.

The spelling of 78473772 in words is "seventy-eight million, four hundred seventy-three thousand, seven hundred seventy-two".