64825890 has 32 divisors (see below), whose sum is σ = 158521536. Its totient is φ = 16960320.

The previous prime is 64825883. The next prime is 64825903. The reversal of 64825890 is 9852846.

64825890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18796 + ... + 21975.

It is an arithmetic number, because the mean of its divisors is an integer number (4953798).

Almost surely, 2^64825890 is an apocalyptic number.

64825890 is an abundant number, since it is smaller than the sum of its proper divisors (93695646).

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

64825890 is a wasteful number, since it uses less digits than its factorization.

64825890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40834.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 64825890 is about 8051.4526639607. The cubic root of 64825890 is about 401.7132555783.

The spelling of 64825890 in words is "sixty-four million, eight hundred twenty-five thousand, eight hundred ninety".