65409490 has 8 divisors (see below), whose sum is σ = 117737100. Its totient is φ = 26163792.

The previous prime is 65409481. The next prime is 65409511. The reversal of 65409490 is 9490456.

65409490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65302561 + 106929 = 8081^2 + 327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3270465 + ... + 3270484.

Almost surely, 2^65409490 is an apocalyptic number.

65409490 is a deficient number, since it is larger than the sum of its proper divisors (52327610).

65409490 is a wasteful number, since it uses less digits than its factorization.

65409490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540956.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 65409490 is about 8087.6133686026. The cubic root of 65409490 is about 402.9151407752.

The spelling of 65409490 in words is "sixty-five million, four hundred nine thousand, four hundred ninety".