78380878 has 8 divisors (see below), whose sum is σ = 118228680. Its totient is φ = 38971320.

The previous prime is 78380867. The next prime is 78380879. The reversal of 78380878 is 87808387.

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

It is a super-2 number, since 2×78380878² = 12287124072101768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78380879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109113 + ... + 109828.

It is an arithmetic number, because the mean of its divisors is an integer number (14778585).

Almost surely, 2^78380878 is an apocalyptic number.

78380878 is a deficient number, since it is larger than the sum of its proper divisors (39847802).

78380878 is a wasteful number, since it uses less digits than its factorization.

78380878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219122.

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 78380878 is about 8853.2975777390. The cubic root of 78380878 is about 427.9601929671.

The spelling of 78380878 in words is "seventy-eight million, three hundred eighty thousand, eight hundred seventy-eight".