64468890 has 24 divisors (see below), whose sum is σ = 167619348. Its totient is φ = 17191680.

The previous prime is 64468889. The next prime is 64468897. The reversal of 64468890 is 9886446.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56295009 + 8173881 = 7503^2 + 2859^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64468897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358071 + ... + 358250.

Almost surely, 2^64468890 is an apocalyptic number.

64468890 is an abundant number, since it is smaller than the sum of its proper divisors (103150458).

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

64468890 is a wasteful number, since it uses less digits than its factorization.

64468890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716334 (or 716331 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 64468890 is about 8029.2521445026. The cubic root of 64468890 is about 400.9744782193.

The spelling of 64468890 in words is "sixty-four million, four hundred sixty-eight thousand, eight hundred ninety".