64485870 has 32 divisors (see below), whose sum is σ = 154980000. Its totient is φ = 17172480.

The previous prime is 64485851. The next prime is 64485871. The reversal of 64485870 is 7858446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64485871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36610 + ... + 38330.

It is an arithmetic number, because the mean of its divisors is an integer number (4843125).

Almost surely, 2^64485870 is an apocalyptic number.

64485870 is an abundant number, since it is smaller than the sum of its proper divisors (90494130).

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

64485870 is a wasteful number, since it uses less digits than its factorization.

64485870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 64485870 is about 8030.3094585452. The cubic root of 64485870 is about 401.0096783961.

The spelling of 64485870 in words is "sixty-four million, four hundred eighty-five thousand, eight hundred seventy".