42899040 has 144 divisors (see below), whose sum is σ = 151272576. Its totient is φ = 11070720.

The previous prime is 42899011. The next prime is 42899053. The reversal of 42899040 is 4099824.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42898986 and 42899004.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1383825 + ... + 1383855.

It is an arithmetic number, because the mean of its divisors is an integer number (1050504).

Almost surely, 2^42899040 is an apocalyptic number.

42899040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42899040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75636288).

42899040 is an abundant number, since it is smaller than the sum of its proper divisors (108373536).

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

42899040 is an equidigital number, since it uses as much as digits as its factorization.

42899040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 42899040 is about 6549.7358725372. The cubic root of 42899040 is about 350.0654027437.

The spelling of 42899040 in words is "forty-two million, eight hundred ninety-nine thousand, forty".