69720240 has 80 divisors (see below), whose sum is σ = 223128576. Its totient is φ = 17990400.

The previous prime is 69720239. The next prime is 69720283. The reversal of 69720240 is 4202796.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 69720198 and 69720207.

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, 2755 + ... + 12125.

Almost surely, 2^69720240 is an apocalyptic number.

69720240 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 69720240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111564288).

69720240 is an abundant number, since it is smaller than the sum of its proper divisors (153408336).

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

69720240 is a wasteful number, since it uses less digits than its factorization.

69720240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418 (or 9412 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 69720240 is about 8349.8646695620. The cubic root of 69720240 is about 411.5787632325.

The spelling of 69720240 in words is "sixty-nine million, seven hundred twenty thousand, two hundred forty".