69140640 has 96 divisors (see below), whose sum is σ = 225348480. Its totient is φ = 17798144.

The previous prime is 69140627. The next prime is 69140641. The reversal of 69140640 is 4604196.

It is a tau number, because it is divible by the number of its divisors (96).

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 = 69140598 and 69140607.

It is not an unprimeable number, because it can be changed into a prime (69140641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11437 + ... + 16403.

It is an arithmetic number, because the mean of its divisors is an integer number (2347380).

Almost surely, 2^69140640 is an apocalyptic number.

69140640 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 69140640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112674240).

69140640 is an abundant number, since it is smaller than the sum of its proper divisors (156207840).

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

69140640 is a wasteful number, since it uses less digits than its factorization.

69140640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014 (or 5006 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 69140640 is about 8315.0850867565. The cubic root of 69140640 is about 410.4350725624.

The spelling of 69140640 in words is "sixty-nine million, one hundred forty thousand, six hundred forty".