42786280 has 32 divisors (see below), whose sum is σ = 101933640. Its totient is φ = 16107520.

The previous prime is 42786277. The next prime is 42786301. The reversal of 42786280 is 8268724.

It can be written as a sum of positive squares in 4 ways, for example, as 39765636 + 3020644 = 6306^2 + 1738^2 .

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, 30781 + ... + 32140.

Almost surely, 2^42786280 is an apocalyptic number.

42786280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42786280 is an abundant number, since it is smaller than the sum of its proper divisors (59147360).

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

42786280 is a wasteful number, since it uses less digits than its factorization.

42786280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62949 (or 62945 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 42786280 is about 6541.1222278750. The cubic root of 42786280 is about 349.7584183246.

The spelling of 42786280 in words is "forty-two million, seven hundred eighty-six thousand, two hundred eighty".