69891228 has 48 divisors (see below), whose sum is σ = 197675520. Its totient is φ = 21178800.

The previous prime is 69891191. The next prime is 69891271. The reversal of 69891228 is 82219896.

It is a super-4 number, since 4×69891228⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

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, 28228 + ... + 30603.

It is an arithmetic number, because the mean of its divisors is an integer number (4118240).

Almost surely, 2^69891228 is an apocalyptic number.

It is an amenable number.

69891228 is an abundant number, since it is smaller than the sum of its proper divisors (127784292).

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

69891228 is a wasteful number, since it uses less digits than its factorization.

69891228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58855 (or 58847 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 69891228 is about 8360.0973678540. The cubic root of 69891228 is about 411.9149524392.

The spelling of 69891228 in words is "sixty-nine million, eight hundred ninety-one thousand, two hundred twenty-eight".