69489840 has 240 divisors, whose sum is σ = 264625920. Its totient is φ = 14999040.

The previous prime is 69489803. The next prime is 69489851. The reversal of 69489840 is 4898496.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 69489840.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223285 + ... + 223595.

It is an arithmetic number, because the mean of its divisors is an integer number (1102608).

Almost surely, 2^69489840 is an apocalyptic number.

69489840 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 69489840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132312960).

69489840 is an abundant number, since it is smaller than the sum of its proper divisors (195136080).

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

69489840 is a wasteful number, since it uses less digits than its factorization.

69489840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 69489840 is about 8336.0566216887. The cubic root of 69489840 is about 411.1248902667.

The spelling of 69489840 in words is "sixty-nine million, four hundred eighty-nine thousand, eight hundred forty".