69828478 has 4 divisors (see below), whose sum is σ = 104742720. Its totient is φ = 34914238.

The previous prime is 69828467. The next prime is 69828487. The reversal of 69828478 is 87482896.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×69828478³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17457118 + ... + 17457121.

It is an arithmetic number, because the mean of its divisors is an integer number (26185680).

Almost surely, 2^69828478 is an apocalyptic number.

69828478 is a deficient number, since it is larger than the sum of its proper divisors (34914242).

69828478 is a wasteful number, since it uses less digits than its factorization.

69828478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34914241.

The product of its digits is 1548288, while the sum is 52.

The square root of 69828478 is about 8356.3435783840. The cubic root of 69828478 is about 411.7916398604.

The spelling of 69828478 in words is "sixty-nine million, eight hundred twenty-eight thousand, four hundred seventy-eight".