78225586 has 32 divisors (see below), whose sum is σ = 126604800. Its totient is φ = 36167040.

The previous prime is 78225569. The next prime is 78225601. The reversal of 78225586 is 68552287.

It is a super-2 number, since 2×78225586² = 12238484610086792, 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 15 ways as a sum of consecutive naturals, for example, 249766 + ... + 250078.

It is an arithmetic number, because the mean of its divisors is an integer number (3956400).

Almost surely, 2^78225586 is an apocalyptic number.

78225586 is a deficient number, since it is larger than the sum of its proper divisors (48379214).

78225586 is a wasteful number, since it uses less digits than its factorization.

78225586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514.

The product of its digits is 268800, while the sum is 43.

The square root of 78225586 is about 8844.5229379543. The cubic root of 78225586 is about 427.6773742711.

The spelling of 78225586 in words is "seventy-eight million, two hundred twenty-five thousand, five hundred eighty-six".