65398998 has 16 divisors (see below), whose sum is σ = 149483520. Its totient is φ = 18685416.

The previous prime is 65398997. The next prime is 65399027. The reversal of 65398998 is 89989356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65398997) 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, 778518 + ... + 778601.

It is an arithmetic number, because the mean of its divisors is an integer number (9342720).

Almost surely, 2^65398998 is an apocalyptic number.

65398998 is an abundant number, since it is smaller than the sum of its proper divisors (84084522).

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

65398998 is a wasteful number, since it uses less digits than its factorization.

65398998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557131.

The product of its digits is 4199040, while the sum is 57.

The square root of 65398998 is about 8086.9646963493. The cubic root of 65398998 is about 402.8935964412.

The spelling of 65398998 in words is "sixty-five million, three hundred ninety-eight thousand, nine hundred ninety-eight".