65240438 has 4 divisors (see below), whose sum is σ = 97860660. Its totient is φ = 32620218.

The previous prime is 65240429. The next prime is 65240449. The reversal of 65240438 is 83404256.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16310108 + ... + 16310111.

It is an arithmetic number, because the mean of its divisors is an integer number (24465165).

Almost surely, 2^65240438 is an apocalyptic number.

65240438 is a deficient number, since it is larger than the sum of its proper divisors (32620222).

65240438 is a wasteful number, since it uses less digits than its factorization.

65240438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32620221.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 65240438 is about 8077.1553160751. The cubic root of 65240438 is about 402.5677275020.

The spelling of 65240438 in words is "sixty-five million, two hundred forty thousand, four hundred thirty-eight".