42783280 has 40 divisors (see below), whose sum is σ = 101792592. Its totient is φ = 16713984.

The previous prime is 42783277. The next prime is 42783287. The reversal of 42783280 is 8238724.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (42783287) 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, 2779 + ... + 9658.

Almost surely, 2^42783280 is an apocalyptic number.

42783280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42783280 is an abundant number, since it is smaller than the sum of its proper divisors (59009312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42783280 is a wasteful number, since it uses less digits than its factorization.

42783280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12493 (or 12487 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 42783280 is about 6540.8929054067. The cubic root of 42783280 is about 349.7502435875.

The spelling of 42783280 in words is "forty-two million, seven hundred eighty-three thousand, two hundred eighty".