69890420 has 12 divisors (see below), whose sum is σ = 146769924. Its totient is φ = 27956160.

The previous prime is 69890393. The next prime is 69890423. The reversal of 69890420 is 2409896.

It can be written as a sum of positive squares in 2 ways, for example, as 8988004 + 60902416 = 2998^2 + 7804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69890423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747241 + ... + 1747280.

It is an arithmetic number, because the mean of its divisors is an integer number (12230827).

Almost surely, 2^69890420 is an apocalyptic number.

It is an amenable number.

69890420 is an abundant number, since it is smaller than the sum of its proper divisors (76879504).

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

69890420 is a wasteful number, since it uses less digits than its factorization.

69890420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494530 (or 3494528 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 69890420 is about 8360.0490429183. The cubic root of 69890420 is about 411.9133650747.

The spelling of 69890420 in words is "sixty-nine million, eight hundred ninety thousand, four hundred twenty".