42787798 has 4 divisors (see below), whose sum is σ = 64181700. Its totient is φ = 21393898.

The previous prime is 42787783. The next prime is 42787807. The reversal of 42787798 is 89778724.

It is a happy number.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 10696948 + ... + 10696951.

It is an arithmetic number, because the mean of its divisors is an integer number (16045425).

Almost surely, 2^42787798 is an apocalyptic number.

42787798 is a deficient number, since it is larger than the sum of its proper divisors (21393902).

42787798 is a wasteful number, since it uses less digits than its factorization.

42787798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21393901.

The product of its digits is 1580544, while the sum is 52.

The square root of 42787798 is about 6541.2382619807. The cubic root of 42787798 is about 349.7625545961.

The spelling of 42787798 in words is "forty-two million, seven hundred eighty-seven thousand, seven hundred ninety-eight".