69726240 has 144 divisors (see below), whose sum is σ = 243950616. Its totient is φ = 18124800.

The previous prime is 69726227. The next prime is 69726247. The reversal of 69726240 is 4262796.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53758224 + 15968016 = 7332^2 + 3996^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 69726195 and 69726204.

It is not an unprimeable number, because it can be changed into a prime (69726247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58450 + ... + 59630.

Almost surely, 2^69726240 is an apocalyptic number.

69726240 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 69726240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121975308).

69726240 is an abundant number, since it is smaller than the sum of its proper divisors (174224376).

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

69726240 is a wasteful number, since it uses less digits than its factorization.

69726240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 69726240 is about 8350.2239490926. The cubic root of 69726240 is about 411.5905694729.

The spelling of 69726240 in words is "sixty-nine million, seven hundred twenty-six thousand, two hundred forty".