42040080 has 80 divisors (see below), whose sum is σ = 144812160. Its totient is φ = 11210112.

The previous prime is 42040069. The next prime is 42040093. The reversal of 42040080 is 8004024.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7572 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (1810152).

Almost surely, 2^42040080 is an apocalyptic number.

42040080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42040080 is an abundant number, since it is smaller than the sum of its proper divisors (102772080).

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

42040080 is a wasteful number, since it uses less digits than its factorization.

42040080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19485 (or 19473 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 42040080 is about 6483.8322001730. The cubic root of 42040080 is about 347.7132000876.

The spelling of 42040080 in words is "forty-two million, forty thousand, eighty".