69745920 has 144 divisors (see below), whose sum is σ = 228699072. Its totient is φ = 18104320.

The previous prime is 69745919. The next prime is 69745943. The reversal of 69745920 is 2954796.

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, 157219 + ... + 157661.

It is an arithmetic number, because the mean of its divisors is an integer number (1588188).

Almost surely, 2^69745920 is an apocalyptic number.

69745920 is a gapful number since it is divisible by the number (60) 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 69745920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114349536).

69745920 is an abundant number, since it is smaller than the sum of its proper divisors (158953152).

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

69745920 is a wasteful number, since it uses less digits than its factorization.

69745920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 69745920 is about 8351.4022774622. The cubic root of 69745920 is about 411.6292891880.

The spelling of 69745920 in words is "sixty-nine million, seven hundred forty-five thousand, nine hundred twenty".