65013890 has 8 divisors (see below), whose sum is σ = 117025020. Its totient is φ = 26005552.

The previous prime is 65013889. The next prime is 65013901. The reversal of 65013890 is 9831056.

It can be written as a sum of positive squares in 2 ways, for example, as 62520649 + 2493241 = 7907^2 + 1579^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250685 + ... + 3250704.

Almost surely, 2^65013890 is an apocalyptic number.

65013890 is a deficient number, since it is larger than the sum of its proper divisors (52011130).

65013890 is a wasteful number, since it uses less digits than its factorization.

65013890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501396.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 65013890 is about 8063.1191235154. The cubic root of 65013890 is about 402.1012137580.

The spelling of 65013890 in words is "sixty-five million, thirteen thousand, eight hundred ninety".