78420195 has 48 divisors (see below), whose sum is σ = 156142272. Its totient is φ = 35665920.

The previous prime is 78420187. The next prime is 78420203. The reversal of 78420195 is 59102487.

It is an interprime number because it is at equal distance from previous prime (78420187) and next prime (78420203).

It is not a de Polignac number, because 78420195 - 2³ = 78420187 is a prime.

It is a super-2 number, since 2×78420195² = 12299453967676050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75399 + ... + 76431.

It is an arithmetic number, because the mean of its divisors is an integer number (3252964).

Almost surely, 2^78420195 is an apocalyptic number.

78420195 is a deficient number, since it is larger than the sum of its proper divisors (77722077).

78420195 is a wasteful number, since it uses less digits than its factorization.

78420195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 78420195 is about 8855.5177714236. The cubic root of 78420195 is about 428.0317380459.

The spelling of 78420195 in words is "seventy-eight million, four hundred twenty thousand, one hundred ninety-five".