64529890 has 16 divisors (see below), whose sum is σ = 122267520. Its totient is φ = 24453360.

The previous prime is 64529869. The next prime is 64529917. The reversal of 64529890 is 9892546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169626 + ... + 170005.

It is an arithmetic number, because the mean of its divisors is an integer number (7641720).

Almost surely, 2^64529890 is an apocalyptic number.

64529890 is a deficient number, since it is larger than the sum of its proper divisors (57737630).

64529890 is a wasteful number, since it uses less digits than its factorization.

64529890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339657.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 64529890 is about 8033.0498566858. The cubic root of 64529890 is about 401.1009047421.

The spelling of 64529890 in words is "sixty-four million, five hundred twenty-nine thousand, eight hundred ninety".