64107890 has 32 divisors (see below), whose sum is σ = 143869824. Its totient is φ = 19981440.

The previous prime is 64107871. The next prime is 64107913. The reversal of 64107890 is 9870146.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 64107890.

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, 40859 + ... + 42398.

It is an arithmetic number, because the mean of its divisors is an integer number (4495932).

Almost surely, 2^64107890 is an apocalyptic number.

64107890 is an abundant number, since it is smaller than the sum of its proper divisors (79761934).

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

64107890 is a wasteful number, since it uses less digits than its factorization.

64107890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83282.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 64107890 is about 8006.7402855344. The cubic root of 64107890 is about 400.2246446467.

The spelling of 64107890 in words is "sixty-four million, one hundred seven thousand, eight hundred ninety".