42779534 has 16 divisors (see below), whose sum is σ = 73516128. Its totient is φ = 18289152.

The previous prime is 42779509. The next prime is 42779537. The reversal of 42779534 is 43597724.

It is a junction number, because it is equal to n+sod(n) for n = 42779491 and 42779500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42779537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534 + ... + 9590.

It is an arithmetic number, because the mean of its divisors is an integer number (4594758).

Almost surely, 2^42779534 is an apocalyptic number.

42779534 is a deficient number, since it is larger than the sum of its proper divisors (30736594).

42779534 is a wasteful number, since it uses less digits than its factorization.

42779534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499.

The product of its digits is 211680, while the sum is 41.

The square root of 42779534 is about 6540.6065467967. The cubic root of 42779534 is about 349.7400355292.

The spelling of 42779534 in words is "forty-two million, seven hundred seventy-nine thousand, five hundred thirty-four".