78204210 has 32 divisors (see below), whose sum is σ = 214503552. Its totient is φ = 17875200.

The previous prime is 78204173. The next prime is 78204221. The reversal of 78204210 is 1240287.

It is a super-2 number, since 2×78204210² = 12231796923448200, which contains 22 as substring.

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, 185991 + ... + 186410.

It is an arithmetic number, because the mean of its divisors is an integer number (6703236).

Almost surely, 2^78204210 is an apocalyptic number.

78204210 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78204210 is an abundant number, since it is smaller than the sum of its proper divisors (136299342).

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

78204210 is a wasteful number, since it uses less digits than its factorization.

78204210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372418.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 78204210 is about 8843.3144239024. The cubic root of 78204210 is about 427.6384148765.

Adding to 78204210 its reverse (1240287), we get a palindrome (79444497).

The spelling of 78204210 in words is "seventy-eight million, two hundred four thousand, two hundred ten".