42999720 has 32 divisors (see below), whose sum is σ = 128999520. Its totient is φ = 11466560.

The previous prime is 42999707. The next prime is 42999739. The reversal of 42999720 is 2799924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179046 + ... + 179285.

It is an arithmetic number, because the mean of its divisors is an integer number (4031235).

Almost surely, 2^42999720 is an apocalyptic number.

42999720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42999720 is an abundant number, since it is smaller than the sum of its proper divisors (85999800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42999720 is a wasteful number, since it uses less digits than its factorization.

42999720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358345 (or 358341 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 42999720 is about 6557.4171744674. The cubic root of 42999720 is about 350.3390456095.

The spelling of 42999720 in words is "forty-two million, nine hundred ninety-nine thousand, seven hundred twenty".