64197140 has 48 divisors (see below), whose sum is σ = 160780032. Its totient is φ = 21052416.

The previous prime is 64197131. The next prime is 64197157. The reversal of 64197140 is 4179146.

It is a junction number, because it is equal to n+sod(n) for n = 64197097 and 64197106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6749 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (3349584).

Almost surely, 2^64197140 is an apocalyptic number.

It is an amenable number.

64197140 is an abundant number, since it is smaller than the sum of its proper divisors (96582892).

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

64197140 is a wasteful number, since it uses less digits than its factorization.

64197140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19976 (or 19974 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 64197140 is about 8012.3117762603. The cubic root of 64197140 is about 400.4102873502.

The spelling of 64197140 in words is "sixty-four million, one hundred ninety-seven thousand, one hundred forty".