69628928 has 44 divisors (see below), whose sum is σ = 140825412. Its totient is φ = 34406400.

The previous prime is 69628907. The next prime is 69628967. The reversal of 69628928 is 82982696.

It can be written as a sum of positive squares in 2 ways, for example, as 46895104 + 22733824 = 6848^2 + 4768^2 .

It is a super-2 number, since 2×69628928² = 9696375228858368, which contains 22 as substring.

It is a congruent number.

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, 98978 + ... + 99678.

Almost surely, 2^69628928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69628928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70412706).

69628928 is an abundant number, since it is smaller than the sum of its proper divisors (71196484).

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

69628928 is an equidigital number, since it uses as much as digits as its factorization.

69628928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 800 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 69628928 is about 8344.3950050318. The cubic root of 69628928 is about 411.3990043420.

The spelling of 69628928 in words is "sixty-nine million, six hundred twenty-eight thousand, nine hundred twenty-eight".