42766390 has 16 divisors (see below), whose sum is σ = 81508032. Its totient is φ = 16100224.

The previous prime is 42766379. The next prime is 42766417. The reversal of 42766390 is 9366724.

It is a super-2 number, since 2×42766390² = 3657928227264200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125614 + ... + 125953.

It is an arithmetic number, because the mean of its divisors is an integer number (5094252).

Almost surely, 2^42766390 is an apocalyptic number.

42766390 is a deficient number, since it is larger than the sum of its proper divisors (38741642).

42766390 is a wasteful number, since it uses less digits than its factorization.

42766390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251591.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 42766390 is about 6539.6016698267. The cubic root of 42766390 is about 349.7042126836.

The spelling of 42766390 in words is "forty-two million, seven hundred sixty-six thousand, three hundred ninety".