42660440 has 16 divisors (see below), whose sum is σ = 95986080. Its totient is φ = 17064160.

The previous prime is 42660407. The next prime is 42660451. The reversal of 42660440 is 4406624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533216 + ... + 533295.

It is an arithmetic number, because the mean of its divisors is an integer number (5999130).

Almost surely, 2^42660440 is an apocalyptic number.

42660440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42660440 is an abundant number, since it is smaller than the sum of its proper divisors (53325640).

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

42660440 is a wasteful number, since it uses less digits than its factorization.

42660440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066522 (or 1066518 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 42660440 is about 6531.4960001519. The cubic root of 42660440 is about 349.4151866477.

The spelling of 42660440 in words is "forty-two million, six hundred sixty thousand, four hundred forty".