42390783 has 20 divisors (see below), whose sum is σ = 63951888. Its totient is φ = 27980640.

The previous prime is 42390773. The next prime is 42390787. The reversal of 42390783 is 38709324.

It is not a de Polignac number, because 42390783 - 2¹⁴ = 42374399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390787) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5803 + ... + 10883.

Almost surely, 2^42390783 is an apocalyptic number.

42390783 is a deficient number, since it is larger than the sum of its proper divisors (21561105).

42390783 is a wasteful number, since it uses less digits than its factorization.

42390783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196 (or 5187 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 42390783 is about 6510.8204552115. The cubic root of 42390783 is about 348.6774111845.

The spelling of 42390783 in words is "forty-two million, three hundred ninety thousand, seven hundred eighty-three".