78470912 has 144 divisors (see below), whose sum is σ = 190582560. Its totient is φ = 31850496.

The previous prime is 78470891. The next prime is 78470933. The reversal of 78470912 is 21907487.

It is an interprime number because it is at equal distance from previous prime (78470891) and next prime (78470933).

It is a super-2 number, since 2×78470912² = 12315368060223488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074908 + ... + 1074980.

It is an arithmetic number, because the mean of its divisors is an integer number (1323490).

Almost surely, 2^78470912 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 78470912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95291280).

78470912 is an abundant number, since it is smaller than the sum of its proper divisors (112111648).

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

78470912 is a wasteful number, since it uses less digits than its factorization.

78470912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 78470912 is about 8858.3808904336. The cubic root of 78470912 is about 428.1239923751.

The spelling of 78470912 in words is "seventy-eight million, four hundred seventy thousand, nine hundred twelve".