78250987 has 8 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 73965384.

The previous prime is 78250969. The next prime is 78250999. The reversal of 78250987 is 78905287.

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

It is a cyclic number.

It is not a de Polignac number, because 78250987 - 2⁷ = 78250859 is a prime.

It is a super-2 number, since 2×78250987² = 12246433932948338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78250937) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4464 + ... + 13282.

It is an arithmetic number, because the mean of its divisors is an integer number (10319400).

Almost surely, 2^78250987 is an apocalyptic number.

78250987 is a deficient number, since it is larger than the sum of its proper divisors (4304213).

78250987 is a wasteful number, since it uses less digits than its factorization.

78250987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9305.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 78250987 is about 8845.9587948396. The cubic root of 78250987 is about 427.7236603091.

The spelling of 78250987 in words is "seventy-eight million, two hundred fifty thousand, nine hundred eighty-seven".