42861040 has 40 divisors (see below), whose sum is σ = 101297088. Its totient is φ = 16861440.

The previous prime is 42860999. The next prime is 42861053. The reversal of 42861040 is 4016824.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42860996 and 42861014.

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, 489 + ... + 9271.

Almost surely, 2^42861040 is an apocalyptic number.

42861040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42861040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50648544).

42861040 is an abundant number, since it is smaller than the sum of its proper divisors (58436048).

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

42861040 is a wasteful number, since it uses less digits than its factorization.

42861040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8857 (or 8851 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 42861040 is about 6546.8343495158. The cubic root of 42861040 is about 349.9620094819.

Adding to 42861040 its reverse (4016824), we get a palindrome (46877864).

The spelling of 42861040 in words is "forty-two million, eight hundred sixty-one thousand, forty".