42798478 has 4 divisors (see below), whose sum is σ = 64197720. Its totient is φ = 21399238.

The previous prime is 42798449. The next prime is 42798479. The reversal of 42798478 is 87489724.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42798479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10699618 + ... + 10699621.

It is an arithmetic number, because the mean of its divisors is an integer number (16049430).

Almost surely, 2^42798478 is an apocalyptic number.

42798478 is a deficient number, since it is larger than the sum of its proper divisors (21399242).

42798478 is a wasteful number, since it uses less digits than its factorization.

42798478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21399241.

The product of its digits is 903168, while the sum is 49.

The square root of 42798478 is about 6542.0545702401. The cubic root of 42798478 is about 349.7916528710.

The spelling of 42798478 in words is "forty-two million, seven hundred ninety-eight thousand, four hundred seventy-eight".