78420606 has 32 divisors (see below), whose sum is σ = 171417600. Its totient is φ = 23719680.

The previous prime is 78420599. The next prime is 78420613. The reversal of 78420606 is 60602487.

It is an interprime number because it is at equal distance from previous prime (78420599) and next prime (78420613).

It is a super-2 number, since 2×78420606² = 12299582890814472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60675 + ... + 61953.

It is an arithmetic number, because the mean of its divisors is an integer number (5356800).

Almost surely, 2^78420606 is an apocalyptic number.

78420606 is an abundant number, since it is smaller than the sum of its proper divisors (92996994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78420606 is a wasteful number, since it uses less digits than its factorization.

78420606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 78420606 is about 8855.5409772639. The cubic root of 78420606 is about 428.0324858156.

The spelling of 78420606 in words is "seventy-eight million, four hundred twenty thousand, six hundred six".