69878250 has 96 divisors (see below), whose sum is σ = 203570640. Its totient is φ = 17193600.

The previous prime is 69878233. The next prime is 69878251. The reversal of 69878250 is 5287896.

It can be written as a sum of positive squares in 8 ways, for example, as 1766241 + 68112009 = 1329^2 + 8253^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 69878196 and 69878205.

It is not an unprimeable number, because it can be changed into a prime (69878251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28056 + ... + 30444.

Almost surely, 2^69878250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69878250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101785320).

69878250 is an abundant number, since it is smaller than the sum of its proper divisors (133692390).

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

69878250 is a wasteful number, since it uses less digits than its factorization.

69878250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 69878250 is about 8359.3211446863. The cubic root of 69878250 is about 411.8894548991.

The spelling of 69878250 in words is "sixty-nine million, eight hundred seventy-eight thousand, two hundred fifty".