42865620 has 48 divisors (see below), whose sum is σ = 137171328. Its totient is φ = 9797760.

The previous prime is 42865579. The next prime is 42865621. The reversal of 42865620 is 2656824.

It is a super-2 number, since 2×42865620² = 3674922755968800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42865621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50611 + ... + 51450.

It is an arithmetic number, because the mean of its divisors is an integer number (2857736).

Almost surely, 2^42865620 is an apocalyptic number.

It is an amenable number.

42865620 is an abundant number, since it is smaller than the sum of its proper divisors (94305708).

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

42865620 is a wasteful number, since it uses less digits than its factorization.

42865620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102080 (or 102078 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 42865620 is about 6547.1841275467. The cubic root of 42865620 is about 349.9744743289.

The spelling of 42865620 in words is "forty-two million, eight hundred sixty-five thousand, six hundred twenty".