78852890 has 8 divisors (see below), whose sum is σ = 141935220. Its totient is φ = 31541152.

The previous prime is 78852877. The next prime is 78852929. The reversal of 78852890 is 9825887.

It can be written as a sum of positive squares in 2 ways, for example, as 65885689 + 12967201 = 8117^2 + 3601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78852890² = 12435556522704200, 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 3 ways as a sum of consecutive naturals, for example, 3942635 + ... + 3942654.

Almost surely, 2^78852890 is an apocalyptic number.

78852890 is a deficient number, since it is larger than the sum of its proper divisors (63082330).

78852890 is a wasteful number, since it uses less digits than its factorization.

78852890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885296.

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 78852890 is about 8879.9149770704. The cubic root of 78852890 is about 428.8175373213.

The spelling of 78852890 in words is "seventy-eight million, eight hundred fifty-two thousand, eight hundred ninety".