42281440 has 48 divisors (see below), whose sum is σ = 100290960. Its totient is φ = 16844800.

The previous prime is 42281401. The next prime is 42281461. The reversal of 42281440 is 4418224.

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, 63831 + ... + 64489.

It is an arithmetic number, because the mean of its divisors is an integer number (2089395).

Almost surely, 2^42281440 is an apocalyptic number.

42281440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42281440 is an abundant number, since it is smaller than the sum of its proper divisors (58009520).

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

42281440 is a wasteful number, since it uses less digits than its factorization.

42281440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 42281440 is about 6502.4180117861. The cubic root of 42281440 is about 348.3773596258.

Adding to 42281440 its reverse (4418224), we get a palindrome (46699664).

The spelling of 42281440 in words is "forty-two million, two hundred eighty-one thousand, four hundred forty".