64198340 has 24 divisors (see below), whose sum is σ = 141912960. Its totient is φ = 24327648.

The previous prime is 64198331. The next prime is 64198349. The reversal of 64198340 is 4389146.

It is an interprime number because it is at equal distance from previous prime (64198331) and next prime (64198349).

It is a self number, because there is not a number n which added to its sum of digits gives 64198340.

It is not an unprimeable number, because it can be changed into a prime (64198349) 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, 84092 + ... + 84851.

It is an arithmetic number, because the mean of its divisors is an integer number (5913040).

Almost surely, 2^64198340 is an apocalyptic number.

It is an amenable number.

64198340 is an abundant number, since it is smaller than the sum of its proper divisors (77714620).

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

64198340 is a wasteful number, since it uses less digits than its factorization.

64198340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168971 (or 168969 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 64198340 is about 8012.3866606648. The cubic root of 64198340 is about 400.4127822139.

The spelling of 64198340 in words is "sixty-four million, one hundred ninety-eight thousand, three hundred forty".