65198420 has 36 divisors (see below), whose sum is σ = 159272820. Its totient is φ = 22353408.

The previous prime is 65198411. The next prime is 65198479. The reversal of 65198420 is 2489156.

It can be written as a sum of positive squares in 2 ways, for example, as 39513796 + 25684624 = 6286^2 + 5068^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32285 + ... + 34244.

It is an arithmetic number, because the mean of its divisors is an integer number (4424245).

Almost surely, 2^65198420 is an apocalyptic number.

It is an amenable number.

65198420 is an abundant number, since it is smaller than the sum of its proper divisors (94074400).

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

65198420 is a wasteful number, since it uses less digits than its factorization.

65198420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66552 (or 66543 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 65198420 is about 8074.5538576444. The cubic root of 65198420 is about 402.4812845740.

The spelling of 65198420 in words is "sixty-five million, one hundred ninety-eight thousand, four hundred twenty".