42047980 has 48 divisors (see below), whose sum is σ = 97330464. Its totient is φ = 15160320.

The previous prime is 42047977. The next prime is 42047983. The reversal of 42047980 is 8974024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42047977) and next prime (42047983).

It is not an unprimeable number, because it can be changed into a prime (42047983) 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, 9300 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (2027718).

Almost surely, 2^42047980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42047980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48665232).

42047980 is an abundant number, since it is smaller than the sum of its proper divisors (55282484).

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

42047980 is a wasteful number, since it uses less digits than its factorization.

42047980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 42047980 is about 6484.4413791783. The cubic root of 42047980 is about 347.7349790045.

It can be divided in two parts, 420 and 47980, that added together give a square (48400 = 220²).

The spelling of 42047980 in words is "forty-two million, forty-seven thousand, nine hundred eighty".