69004428 has 72 divisors (see below), whose sum is σ = 180118512. Its totient is φ = 20487168.

The previous prime is 69004421. The next prime is 69004477. The reversal of 69004428 is 82440096.

It is a super-2 number, since 2×69004428² = 9523222167214368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69004421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73176 + ... + 74112.

It is an arithmetic number, because the mean of its divisors is an integer number (2501646).

Almost surely, 2^69004428 is an apocalyptic number.

69004428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69004428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90059256).

69004428 is an abundant number, since it is smaller than the sum of its proper divisors (111114084).

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

69004428 is a wasteful number, since it uses less digits than its factorization.

69004428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 69004428 is about 8306.8903929208. The cubic root of 69004428 is about 410.1653665671.

The spelling of 69004428 in words is "sixty-nine million, four thousand, four hundred twenty-eight".