69816428 has 12 divisors (see below), whose sum is σ = 133285992. Its totient is φ = 31734720.

The previous prime is 69816407. The next prime is 69816443. The reversal of 69816428 is 82461896.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1586737 = 69816428 / (6 + 9 + 8 + 1 + 6 + 4 + 2 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793325 + ... + 793412.

It is an arithmetic number, because the mean of its divisors is an integer number (11107166).

Almost surely, 2^69816428 is an apocalyptic number.

It is an amenable number.

69816428 is a deficient number, since it is larger than the sum of its proper divisors (63469564).

69816428 is a wasteful number, since it uses less digits than its factorization.

69816428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586752 (or 1586750 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 69816428 is about 8355.6225381476. The cubic root of 69816428 is about 411.7679514606.

The spelling of 69816428 in words is "sixty-nine million, eight hundred sixteen thousand, four hundred twenty-eight".