42991876 has 24 divisors (see below), whose sum is σ = 78833664. Its totient is φ = 20475840.

The previous prime is 42991859. The next prime is 42991877. The reversal of 42991876 is 67819924.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (42991877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25021 + ... + 26683.

It is an arithmetic number, because the mean of its divisors is an integer number (3284736).

Almost surely, 2^42991876 is an apocalyptic number.

42991876 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42991876 is a deficient number, since it is larger than the sum of its proper divisors (35841788).

42991876 is a wasteful number, since it uses less digits than its factorization.

42991876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 1969 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 42991876 is about 6556.8190458484. The cubic root of 42991876 is about 350.3177413887.

The spelling of 42991876 in words is "forty-two million, nine hundred ninety-one thousand, eight hundred seventy-six".