78380001 has 16 divisors (see below), whose sum is σ = 132707200. Its totient is φ = 44788464.

The previous prime is 78379993. The next prime is 78380009. The reversal of 78380001 is 10008387.

It is an interprime number because it is at equal distance from previous prime (78379993) and next prime (78380009).

It is not a de Polignac number, because 78380001 - 2³ = 78379993 is a prime.

It is a super-2 number, since 2×78380001² = 12286849113520002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78380009) 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 15 ways as a sum of consecutive naturals, for example, 207166 + ... + 207543.

It is an arithmetic number, because the mean of its divisors is an integer number (8294200).

Almost surely, 2^78380001 is an apocalyptic number.

It is an amenable number.

78380001 is a deficient number, since it is larger than the sum of its proper divisors (54327199).

78380001 is a wasteful number, since it uses less digits than its factorization.

78380001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414725 (or 414719 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 78380001 is about 8853.2480480330. The cubic root of 78380001 is about 427.9585968189.

Adding to 78380001 its reverse (10008387), we get a palindrome (88388388).

The spelling of 78380001 in words is "seventy-eight million, three hundred eighty thousand, one".