64985406 has 16 divisors (see below), whose sum is σ = 130491648. Its totient is φ = 21575000.

The previous prime is 64985399. The next prime is 64985411. The reversal of 64985406 is 60458946.

It is a congruent number.

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, 20070 + ... + 23081.

It is an arithmetic number, because the mean of its divisors is an integer number (8155728).

Almost surely, 2^64985406 is an apocalyptic number.

64985406 is an abundant number, since it is smaller than the sum of its proper divisors (65506242).

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

64985406 is a wasteful number, since it uses less digits than its factorization.

64985406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43407.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 64985406 is about 8061.3526160316. The cubic root of 64985406 is about 402.0424820826.

The spelling of 64985406 in words is "sixty-four million, nine hundred eighty-five thousand, four hundred six".