64969590 has 96 divisors (see below), whose sum is σ = 183120480. Its totient is φ = 14708736.

The previous prime is 64969589. The next prime is 64969591. The reversal of 64969590 is 9596946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64969589) and next prime (64969591).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64969591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283596 + ... + 283824.

It is an arithmetic number, because the mean of its divisors is an integer number (1907505).

Almost surely, 2^64969590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64969590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91560240).

64969590 is an abundant number, since it is smaller than the sum of its proper divisors (118150890).

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

64969590 is a wasteful number, since it uses less digits than its factorization.

64969590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 64969590 is about 8060.3715795241. The cubic root of 64969590 is about 402.0098633752.

The spelling of 64969590 in words is "sixty-four million, nine hundred sixty-nine thousand, five hundred ninety".