42640814 has 4 divisors (see below), whose sum is σ = 63961224. Its totient is φ = 21320406.

The previous prime is 42640799. The next prime is 42640823. The reversal of 42640814 is 41804624.

42640814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660202 + ... + 10660205.

It is an arithmetic number, because the mean of its divisors is an integer number (15990306).

Almost surely, 2^42640814 is an apocalyptic number.

42640814 is a deficient number, since it is larger than the sum of its proper divisors (21320410).

42640814 is a wasteful number, since it uses less digits than its factorization.

42640814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21320409.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42640814 is about 6529.9934150043. The cubic root of 42640814 is about 349.3615954334.

The spelling of 42640814 in words is "forty-two million, six hundred forty thousand, eight hundred fourteen".