42440688 has 60 divisors (see below), whose sum is σ = 122882760. Its totient is φ = 13657728.

The previous prime is 42440669. The next prime is 42440693. The reversal of 42440688 is 88604424.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 906 + ... + 9257.

It is an arithmetic number, because the mean of its divisors is an integer number (2048046).

Almost surely, 2^42440688 is an apocalyptic number.

42440688 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42440688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61441380).

42440688 is an abundant number, since it is smaller than the sum of its proper divisors (80442072).

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

42440688 is a wasteful number, since it uses less digits than its factorization.

42440688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206 (or 10197 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 42440688 is about 6514.6517942251. The cubic root of 42440688 is about 348.8141855887.

The spelling of 42440688 in words is "forty-two million, four hundred forty thousand, six hundred eighty-eight".