78729300 has 144 divisors (see below), whose sum is σ = 272690880. Its totient is φ = 19370880.

The previous prime is 78729281. The next prime is 78729317. The reversal of 78729300 is 392787.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33979 + ... + 36221.

Almost surely, 2^78729300 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 78729300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136345440).

78729300 is an abundant number, since it is smaller than the sum of its proper divisors (193961580).

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

78729300 is a wasteful number, since it uses less digits than its factorization.

78729300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 78729300 is about 8872.9532851244. The cubic root of 78729300 is about 428.5933845894.

The spelling of 78729300 in words is "seventy-eight million, seven hundred twenty-nine thousand, three hundred".