42399782 has 4 divisors (see below), whose sum is σ = 63599676. Its totient is φ = 21199890.

The previous prime is 42399761. The next prime is 42399821. The reversal of 42399782 is 28799324.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10599944 + ... + 10599947.

It is an arithmetic number, because the mean of its divisors is an integer number (15899919).

Almost surely, 2^42399782 is an apocalyptic number.

42399782 is a deficient number, since it is larger than the sum of its proper divisors (21199894).

42399782 is a wasteful number, since it uses less digits than its factorization.

42399782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21199893.

The product of its digits is 217728, while the sum is 44.

The square root of 42399782 is about 6511.5114988764. The cubic root of 42399782 is about 348.7020826326.

The spelling of 42399782 in words is "forty-two million, three hundred ninety-nine thousand, seven hundred eighty-two".