65404290 has 64 divisors (see below), whose sum is σ = 183591936. Its totient is φ = 14599872.

The previous prime is 65404189. The next prime is 65404301. The reversal of 65404290 is 9240456.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5409 + ... + 12651.

It is an arithmetic number, because the mean of its divisors is an integer number (2868624).

Almost surely, 2^65404290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65404290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91795968).

65404290 is an abundant number, since it is smaller than the sum of its proper divisors (118187646).

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

65404290 is a wasteful number, since it uses less digits than its factorization.

65404290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7303.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 65404290 is about 8087.2918829482. The cubic root of 65404290 is about 402.9044633529.

The spelling of 65404290 in words is "sixty-five million, four hundred four thousand, two hundred ninety".