65397138 has 16 divisors (see below), whose sum is σ = 130874016. Its totient is φ = 21785760.

The previous prime is 65397131. The next prime is 65397139. The reversal of 65397138 is 83179356.

It is a self number, because there is not a number n which added to its sum of digits gives 65397138.

It is not an unprimeable number, because it can be changed into a prime (65397131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15873 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (8179626).

Almost surely, 2^65397138 is an apocalyptic number.

65397138 is an abundant number, since it is smaller than the sum of its proper divisors (65476878).

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

65397138 is a wasteful number, since it uses less digits than its factorization.

65397138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649.

The product of its digits is 136080, while the sum is 42.

The square root of 65397138 is about 8086.8496956479. The cubic root of 65397138 is about 402.8897768659.

The spelling of 65397138 in words is "sixty-five million, three hundred ninety-seven thousand, one hundred thirty-eight".