69997284 has 90 divisors (see below), whose sum is σ = 212910390. Its totient is φ = 19994688.

The previous prime is 69997283. The next prime is 69997289. The reversal of 69997284 is 48279996.

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 25401600 = 6678^2 + 5040^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 69997284.

It is not an unprimeable number, because it can be changed into a prime (69997283) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 13672 + ... + 18080.

It is an arithmetic number, because the mean of its divisors is an integer number (2365671).

Almost surely, 2^69997284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69997284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106455195).

69997284 is an abundant number, since it is smaller than the sum of its proper divisors (142913106).

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

69997284 is a wasteful number, since it uses less digits than its factorization.

69997284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439 (or 4421 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 69997284 is about 8366.4379517212. The cubic root of 69997284 is about 412.1231997163.

The spelling of 69997284 in words is "sixty-nine million, nine hundred ninety-seven thousand, two hundred eighty-four".