78378059 has 8 divisors (see below), whose sum is σ = 82597440. Its totient is φ = 74168136.

The previous prime is 78378049. The next prime is 78378103. The reversal of 78378059 is 95087387.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78378059 is a prime.

It is a super-2 number, since 2×78378059² = 12286240265214962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78378049) 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, 20324 + ... + 23870.

It is an arithmetic number, because the mean of its divisors is an integer number (10324680).

Almost surely, 2^78378059 is an apocalyptic number.

78378059 is a deficient number, since it is larger than the sum of its proper divisors (4219381).

78378059 is a wasteful number, since it uses less digits than its factorization.

78378059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 78378059 is about 8853.1383700923. The cubic root of 78378059 is about 427.9550623184.

The spelling of 78378059 in words is "seventy-eight million, three hundred seventy-eight thousand, fifty-nine".