42457830 has 32 divisors (see below), whose sum is σ = 103573728. Its totient is φ = 11136000.

The previous prime is 42457819. The next prime is 42457843. The reversal of 42457830 is 3875424.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42457791 and 42457800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9771 + ... + 13430.

It is an arithmetic number, because the mean of its divisors is an integer number (3236679).

Almost surely, 2^42457830 is an apocalyptic number.

42457830 is an abundant number, since it is smaller than the sum of its proper divisors (61115898).

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

42457830 is a wasteful number, since it uses less digits than its factorization.

42457830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23272.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 42457830 is about 6515.9673111519. The cubic root of 42457830 is about 348.8611418485.

The spelling of 42457830 in words is "forty-two million, four hundred fifty-seven thousand, eight hundred thirty".