69006240 has 144 divisors (see below), whose sum is σ = 237700008. Its totient is φ = 18229248.

The previous prime is 69006229. The next prime is 69006251. The reversal of 69006240 is 4260096.

It is an interprime number because it is at equal distance from previous prime (69006229) and next prime (69006251).

It can be written as a sum of positive squares in 4 ways, for example, as 58430736 + 10575504 = 7644^2 + 3252^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×69006240² = 9523722317875200, which contains 22 as substring.

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, 248982 + ... + 249258.

Almost surely, 2^69006240 is an apocalyptic number.

69006240 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 69006240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118850004).

69006240 is an abundant number, since it is smaller than the sum of its proper divisors (168693768).

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

69006240 is a wasteful number, since it uses less digits than its factorization.

69006240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 69006240 is about 8306.9994582882. Note that the first 3 decimals coincide. The cubic root of 69006240 is about 410.1689567383.

The spelling of 69006240 in words is "sixty-nine million, six thousand, two hundred forty".