78380731 has 8 divisors (see below), whose sum is σ = 92083824. Its totient is φ = 65773920.

The previous prime is 78380683. The next prime is 78380737. The reversal of 78380731 is 13708387.

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 78380731 - 2¹¹ = 78378683 is a prime.

It is a super-2 number, since 2×78380731² = 12287077984188722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78380737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273916 + ... + 274201.

It is an arithmetic number, because the mean of its divisors is an integer number (11510478).

Almost surely, 2^78380731 is an apocalyptic number.

78380731 is a deficient number, since it is larger than the sum of its proper divisors (13703093).

78380731 is a wasteful number, since it uses less digits than its factorization.

78380731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548141.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 78380731 is about 8853.2892757438. The cubic root of 78380731 is about 427.9599254265.

The spelling of 78380731 in words is "seventy-eight million, three hundred eighty thousand, seven hundred thirty-one".