78204854 has 32 divisors (see below), whose sum is σ = 146845440. Its totient is φ = 30409632.

The previous prime is 78204809. The next prime is 78204857. The reversal of 78204854 is 45840287.

It is a super-2 number, since 2×78204854² = 12231998378322632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78204857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7097 + ... + 14379.

It is an arithmetic number, because the mean of its divisors is an integer number (4588920).

Almost surely, 2^78204854 is an apocalyptic number.

78204854 is a deficient number, since it is larger than the sum of its proper divisors (68640586).

78204854 is a wasteful number, since it uses less digits than its factorization.

78204854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7364.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 78204854 is about 8843.3508355148. The cubic root of 78204854 is about 427.6395887195.

The spelling of 78204854 in words is "seventy-eight million, two hundred four thousand, eight hundred fifty-four".