42707540 has 24 divisors (see below), whose sum is σ = 90697320. Its totient is φ = 16890368.

The previous prime is 42707531. The next prime is 42707551. The reversal of 42707540 is 4570724.

It can be written as a sum of positive squares in 4 ways, for example, as 1926544 + 40780996 = 1388^2 + 6386^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10217 + ... + 13776.

It is an arithmetic number, because the mean of its divisors is an integer number (3779055).

Almost surely, 2^42707540 is an apocalyptic number.

It is an amenable number.

42707540 is an abundant number, since it is smaller than the sum of its proper divisors (47989780).

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

42707540 is a wasteful number, since it uses less digits than its factorization.

42707540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24091 (or 24089 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 42707540 is about 6535.1006113143. The cubic root of 42707540 is about 349.5437319877.

The spelling of 42707540 in words is "forty-two million, seven hundred seven thousand, five hundred forty".