42799540 has 96 divisors (see below), whose sum is σ = 111283200. Its totient is φ = 13773312.

The previous prime is 42799529. The next prime is 42799543. The reversal of 42799540 is 4599724.

It is a junction number, because it is equal to n+sod(n) for n = 42799493 and 42799502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42799543) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 116437 + ... + 116803.

It is an arithmetic number, because the mean of its divisors is an integer number (1159200).

Almost surely, 2^42799540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42799540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55641600).

42799540 is an abundant number, since it is smaller than the sum of its proper divisors (68483660).

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

42799540 is a wasteful number, since it uses less digits than its factorization.

42799540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 42799540 is about 6542.1357368982. The cubic root of 42799540 is about 349.7945460865.

The spelling of 42799540 in words is "forty-two million, seven hundred ninety-nine thousand, five hundred forty".