78887205 has 12 divisors (see below), whose sum is σ = 136737900. Its totient is φ = 42073152.

The previous prime is 78887173. The next prime is 78887233. The reversal of 78887205 is 50278887.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35247969 + 43639236 = 5937^2 + 6606^2 .

It is not a de Polignac number, because 78887205 - 2⁵ = 78887173 is a prime.

It is a super-2 number, since 2×78887205² = 12446382225424050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1753049 = 78887205 / (7 + 8 + 8 + 8 + 7 + 2 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 876480 + ... + 876569.

It is an arithmetic number, because the mean of its divisors is an integer number (11394825).

Almost surely, 2^78887205 is an apocalyptic number.

It is an amenable number.

78887205 is a deficient number, since it is larger than the sum of its proper divisors (57850695).

78887205 is a wasteful number, since it uses less digits than its factorization.

78887205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753060 (or 1753057 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 78887205 is about 8881.8469363078. The cubic root of 78887205 is about 428.8797322085.

The spelling of 78887205 in words is "seventy-eight million, eight hundred eighty-seven thousand, two hundred five".