42246840 has 32 divisors (see below), whose sum is σ = 126740880. Its totient is φ = 11265792.

The previous prime is 42246839. The next prime is 42246857. The reversal of 42246840 is 4864224.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42246798 and 42246807.

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, 175909 + ... + 176148.

Almost surely, 2^42246840 is an apocalyptic number.

42246840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42246840 is an abundant number, since it is smaller than the sum of its proper divisors (84494040).

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

42246840 is a wasteful number, since it uses less digits than its factorization.

42246840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352071 (or 352067 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 42246840 is about 6499.7569185316. The cubic root of 42246840 is about 348.2823049467.

The spelling of 42246840 in words is "forty-two million, two hundred forty-six thousand, eight hundred forty".