64291938 has 16 divisors (see below), whose sum is σ = 130212480. Its totient is φ = 21159216.

The previous prime is 64291933. The next prime is 64291939. The reversal of 64291938 is 83919246.

It is a super-3 number, since 3×64291938³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64291938.

It is not an unprimeable number, because it can be changed into a prime (64291933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67345 + ... + 68292.

It is an arithmetic number, because the mean of its divisors is an integer number (8138280).

Almost surely, 2^64291938 is an apocalyptic number.

64291938 is an abundant number, since it is smaller than the sum of its proper divisors (65920542).

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

64291938 is a wasteful number, since it uses less digits than its factorization.

64291938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135721.

The product of its digits is 93312, while the sum is 42.

The square root of 64291938 is about 8018.2253647550. The cubic root of 64291938 is about 400.6072817224.

The spelling of 64291938 in words is "sixty-four million, two hundred ninety-one thousand, nine hundred thirty-eight".