42769279 has 8 divisors (see below), whose sum is σ = 49126400. Its totient is φ = 36473976.

The previous prime is 42769271. The next prime is 42769283. The reversal of 42769279 is 97296724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42769279 - 2³ = 42769271 is a prime.

It is a super-2 number, since 2×42769279² = 3658422452359682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42769271) 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, 13959 + ... + 16744.

It is an arithmetic number, because the mean of its divisors is an integer number (6140800).

Almost surely, 2^42769279 is an apocalyptic number.

42769279 is a deficient number, since it is larger than the sum of its proper divisors (6357121).

42769279 is a wasteful number, since it uses less digits than its factorization.

42769279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30909.

The product of its digits is 381024, while the sum is 46.

The square root of 42769279 is about 6539.8225511095. The cubic root of 42769279 is about 349.7120870348.

The spelling of 42769279 in words is "forty-two million, seven hundred sixty-nine thousand, two hundred seventy-nine".