64987442 has 8 divisors (see below), whose sum is σ = 104979756. Its totient is φ = 29994192.

The previous prime is 64987409. The next prime is 64987453. The reversal of 64987442 is 24478946.

It can be written as a sum of positive squares in 2 ways, for example, as 55071241 + 9916201 = 7421^2 + 3149^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 64987393 and 64987402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1249733 + ... + 1249784.

Almost surely, 2^64987442 is an apocalyptic number.

64987442 is a deficient number, since it is larger than the sum of its proper divisors (39992314).

64987442 is a wasteful number, since it uses less digits than its factorization.

64987442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499532.

The product of its digits is 387072, while the sum is 44.

The square root of 64987442 is about 8061.4788965797. The cubic root of 64987442 is about 402.0466807173.

It can be divided in two parts, 6498 and 7442, that multiplied together give a square (48358116 = 6954²).

The spelling of 64987442 in words is "sixty-four million, nine hundred eighty-seven thousand, four hundred forty-two".