42040620 has 60 divisors (see below), whose sum is σ = 131888064. Its totient is φ = 11210400.

The previous prime is 42040613. The next prime is 42040631. The reversal of 42040620 is 2604024.

42040620 is a `hidden beast` number, since 4 + 2 + 0 + 40 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 42040593 and 42040602.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11356 + ... + 14595.

Almost surely, 2^42040620 is an apocalyptic number.

It is an amenable number.

42040620 is an abundant number, since it is smaller than the sum of its proper divisors (89847444).

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

42040620 is a wasteful number, since it uses less digits than its factorization.

42040620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25972 (or 25961 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42040620 is about 6483.8738420793. The cubic root of 42040620 is about 347.7146888599.

Adding to 42040620 its reverse (2604024), we get a palindrome (44644644).

The spelling of 42040620 in words is "forty-two million, forty thousand, six hundred twenty".