42758840 has 32 divisors (see below), whose sum is σ = 100392480. Its totient is φ = 16359552.

The previous prime is 42758839. The next prime is 42758851. The reversal of 42758840 is 4885724.

It is a junction number, because it is equal to n+sod(n) for n = 42758794 and 42758803.

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, 22319 + ... + 24158.

It is an arithmetic number, because the mean of its divisors is an integer number (3137265).

Almost surely, 2^42758840 is an apocalyptic number.

42758840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42758840 is an abundant number, since it is smaller than the sum of its proper divisors (57633640).

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

42758840 is a wasteful number, since it uses less digits than its factorization.

42758840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46511 (or 46507 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 42758840 is about 6539.0243920634. The cubic root of 42758840 is about 349.6836324866.

The spelling of 42758840 in words is "forty-two million, seven hundred fifty-eight thousand, eight hundred forty".