64881402 has 8 divisors (see below), whose sum is σ = 129762816. Its totient is φ = 21627132.

The previous prime is 64881391. The next prime is 64881403. The reversal of 64881402 is 20418846.

It is a sphenic number, since it is the product of 3 distinct primes.

64881402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (64881403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5406778 + ... + 5406789.

It is an arithmetic number, because the mean of its divisors is an integer number (16220352).

Almost surely, 2^64881402 is an apocalyptic number.

64881402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64881402 is a wasteful number, since it uses less digits than its factorization.

64881402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813572.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 64881402 is about 8054.8992544910. The cubic root of 64881402 is about 401.8278885022.

The spelling of 64881402 in words is "sixty-four million, eight hundred eighty-one thousand, four hundred two".