78260578 has 8 divisors (see below), whose sum is σ = 128062800. Its totient is φ = 35572980.

The previous prime is 78260569. The next prime is 78260627. The reversal of 78260578 is 87506287.

It is a happy number.

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

It is a super-2 number, since 2×78260578² = 12249436137788168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778628 + ... + 1778671.

It is an arithmetic number, because the mean of its divisors is an integer number (16007850).

Almost surely, 2^78260578 is an apocalyptic number.

78260578 is a deficient number, since it is larger than the sum of its proper divisors (49802222).

78260578 is a wasteful number, since it uses less digits than its factorization.

78260578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557312.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 78260578 is about 8846.5008901825. The cubic root of 78260578 is about 427.7411345511.

The spelling of 78260578 in words is "seventy-eight million, two hundred sixty thousand, five hundred seventy-eight".