42957778 has 8 divisors (see below), whose sum is σ = 64470960. Its totient is φ = 21467460.

The previous prime is 42957763. The next prime is 42957779. The reversal of 42957778 is 87775924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42957779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213 + ... + 9271.

It is an arithmetic number, because the mean of its divisors is an integer number (8058870).

Almost surely, 2^42957778 is an apocalyptic number.

42957778 is a deficient number, since it is larger than the sum of its proper divisors (21513182).

42957778 is a wasteful number, since it uses less digits than its factorization.

42957778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11432.

The product of its digits is 987840, while the sum is 49.

The square root of 42957778 is about 6554.2183363083. The cubic root of 42957778 is about 350.2251014541.

The spelling of 42957778 in words is "forty-two million, nine hundred fifty-seven thousand, seven hundred seventy-eight".