42299728 has 10 divisors (see below), whose sum is σ = 81955754. Its totient is φ = 21149856.

The previous prime is 42299707. The next prime is 42299743. The reversal of 42299728 is 82799224.

It can be written as a sum of positive squares in only one way, i.e., 42146064 + 153664 = 6492^2 + 392^2 .

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, 1321851 + ... + 1321882.

Almost surely, 2^42299728 is an apocalyptic number.

It is an amenable number.

42299728 is a deficient number, since it is larger than the sum of its proper divisors (39656026).

42299728 is a wasteful number, since it uses less digits than its factorization.

42299728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643741 (or 2643735 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 42299728 is about 6503.8241058626. The cubic root of 42299728 is about 348.4275802963.

The spelling of 42299728 in words is "forty-two million, two hundred ninety-nine thousand, seven hundred twenty-eight".