78198652 has 12 divisors (see below), whose sum is σ = 156397360. Its totient is φ = 33513696.

The previous prime is 78198611. The next prime is 78198667. The reversal of 78198652 is 25689187.

78198652 is an admirable number.

It is a super-2 number, since 2×78198652² = 12230058349234208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396377 + ... + 1396432.

Almost surely, 2^78198652 is an apocalyptic number.

It is an amenable number.

78198652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78198652 is a wasteful number, since it uses less digits than its factorization.

78198652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792820 (or 2792818 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 78198652 is about 8843.0001696257. Note that the first 3 decimals coincide. The cubic root of 78198652 is about 427.6282838336.

It can be divided in two parts, 7819 and 8652, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 78198652 in words is "seventy-eight million, one hundred ninety-eight thousand, six hundred fifty-two".