39421288 has 8 divisors (see below), whose sum is σ = 73914930. Its totient is φ = 19710640.

The previous prime is 39421273. The next prime is 39421301. The reversal of 39421288 is 88212493.

It can be written as a sum of positive squares in only one way, i.e., 38464804 + 956484 = 6202^2 + 978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×39421288⁴ (a number of 31 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2463823 + ... + 2463838.

Almost surely, 2^39421288 is an apocalyptic number.

It is an amenable number.

39421288 is a deficient number, since it is larger than the sum of its proper divisors (34493642).

39421288 is a wasteful number, since it uses less digits than its factorization.

39421288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927667 (or 4927663 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 39421288 is about 6278.6374318000. The cubic root of 39421288 is about 340.3378648377.

The spelling of 39421288 in words is "thirty-nine million, four hundred twenty-one thousand, two hundred eighty-eight".