78347430 has 96 divisors (see below), whose sum is σ = 242970624. Its totient is φ = 17126208.

The previous prime is 78347429. The next prime is 78347483. The reversal of 78347430 is 3474387.

It is a super-2 number, since 2×78347430² = 12276639575209800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 11787 + ... + 17193.

It is an arithmetic number, because the mean of its divisors is an integer number (2530944).

Almost surely, 2^78347430 is an apocalyptic number.

78347430 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78347430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121485312).

78347430 is an abundant number, since it is smaller than the sum of its proper divisors (164623194).

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

78347430 is a wasteful number, since it uses less digits than its factorization.

78347430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450 (or 5447 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 78347430 is about 8851.4083625150. The cubic root of 78347430 is about 427.8993088605.

The spelling of 78347430 in words is "seventy-eight million, three hundred forty-seven thousand, four hundred thirty".