78208270 has 32 divisors (see below), whose sum is σ = 161280000. Its totient is φ = 26748576.

The previous prime is 78208259. The next prime is 78208301. The reversal of 78208270 is 7280287.

It is a super-2 number, since 2×78208270² = 12233066992785800, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 33811 + ... + 36049.

It is an arithmetic number, because the mean of its divisors is an integer number (5040000).

Almost surely, 2^78208270 is an apocalyptic number.

78208270 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78208270 is an abundant number, since it is smaller than the sum of its proper divisors (83071730).

78208270 is a wasteful number, since it uses less digits than its factorization.

78208270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 78208270 is about 8843.5439728652. The cubic root of 78208270 is about 427.6458150831.

The spelling of 78208270 in words is "seventy-eight million, two hundred eight thousand, two hundred seventy".