78261383 has 8 divisors (see below), whose sum is σ = 79691040. Its totient is φ = 76840960.

The previous prime is 78261367. The next prime is 78261389. The reversal of 78261383 is 38316287.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78261383 - 2⁴ = 78261367 is a prime.

It is a super-2 number, since 2×78261383² = 12249688138145378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78261389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16103 + ... + 20391.

It is an arithmetic number, because the mean of its divisors is an integer number (9961380).

Almost surely, 2^78261383 is an apocalyptic number.

78261383 is a deficient number, since it is larger than the sum of its proper divisors (1429657).

78261383 is a wasteful number, since it uses less digits than its factorization.

78261383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617.

The product of its digits is 48384, while the sum is 38.

The square root of 78261383 is about 8846.5463882806. The cubic root of 78261383 is about 427.7426011491.

The spelling of 78261383 in words is "seventy-eight million, two hundred sixty-one thousand, three hundred eighty-three".