64021902 has 32 divisors (see below), whose sum is σ = 146890752. Its totient is φ = 18222624.

The previous prime is 64021901. The next prime is 64021921. The reversal of 64021902 is 20912046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64021901) 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, 8883 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (4590336).

Almost surely, 2^64021902 is an apocalyptic number.

64021902 is an abundant number, since it is smaller than the sum of its proper divisors (82868850).

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

64021902 is a wasteful number, since it uses less digits than its factorization.

64021902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 64021902 is about 8001.3687579064. The cubic root of 64021902 is about 400.0456239626.

Adding to 64021902 its reverse (20912046), we get a palindrome (84933948).

The spelling of 64021902 in words is "sixty-four million, twenty-one thousand, nine hundred two".