69420240 has 120 divisors (see below), whose sum is σ = 241838688. Its totient is φ = 18506880.

The previous prime is 69420161. The next prime is 69420277. The reversal of 69420240 is 4202496.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17655 + ... + 21225.

Almost surely, 2^69420240 is an apocalyptic number.

69420240 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 69420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120919344).

69420240 is an abundant number, since it is smaller than the sum of its proper divisors (172418448).

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

69420240 is a wasteful number, since it uses less digits than its factorization.

69420240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599 (or 3581 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 69420240 is about 8331.8809400999. The cubic root of 69420240 is about 410.9875855380.

The spelling of 69420240 in words is "sixty-nine million, four hundred twenty thousand, two hundred forty".