78361407 has 6 divisors (see below), whose sum is σ = 113188712. Its totient is φ = 52240932.

The previous prime is 78361363. The next prime is 78361427. The reversal of 78361407 is 70416387.

It is not a de Polignac number, because 78361407 - 2¹⁶ = 78295871 is a prime.

It is a super-2 number, since 2×78361407² = 12281020214039298, 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 (78361427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4353403 + ... + 4353420.

Almost surely, 2^78361407 is an apocalyptic number.

78361407 is a deficient number, since it is larger than the sum of its proper divisors (34827305).

78361407 is a wasteful number, since it uses less digits than its factorization.

78361407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8706829 (or 8706826 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 78361407 is about 8852.1978626779. The cubic root of 78361407 is about 427.9247527627.

The spelling of 78361407 in words is "seventy-eight million, three hundred sixty-one thousand, four hundred seven".