42782456 has 8 divisors (see below), whose sum is σ = 80217120. Its totient is φ = 21391224.

The previous prime is 42782423. The next prime is 42782459. The reversal of 42782456 is 65428724.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42782459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2673896 + ... + 2673911.

It is an arithmetic number, because the mean of its divisors is an integer number (10027140).

Almost surely, 2^42782456 is an apocalyptic number.

It is an amenable number.

42782456 is a deficient number, since it is larger than the sum of its proper divisors (37434664).

42782456 is a wasteful number, since it uses less digits than its factorization.

42782456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347813 (or 5347809 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 42782456 is about 6540.8299167613. The cubic root of 42782456 is about 349.7479981928.

The spelling of 42782456 in words is "forty-two million, seven hundred eighty-two thousand, four hundred fifty-six".