69428720 has 80 divisors (see below), whose sum is σ = 170614080. Its totient is φ = 26222592.

The previous prime is 69428707. The next prime is 69428759. The reversal of 69428720 is 2782496.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178286 + ... + 178674.

It is an arithmetic number, because the mean of its divisors is an integer number (2132676).

Almost surely, 2^69428720 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 69428720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85307040).

69428720 is an abundant number, since it is smaller than the sum of its proper divisors (101185360).

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

69428720 is a wasteful number, since it uses less digits than its factorization.

69428720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 69428720 is about 8332.3898132529. The cubic root of 69428720 is about 411.0043195281.

The spelling of 69428720 in words is "sixty-nine million, four hundred twenty-eight thousand, seven hundred twenty".