42881416 has 8 divisors (see below), whose sum is σ = 80402670. Its totient is φ = 21440704.

The previous prime is 42881413. The next prime is 42881467. The reversal of 42881416 is 61418824.

It can be written as a sum of positive squares in only one way, i.e., 35880100 + 7001316 = 5990^2 + 2646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×42881416³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42881413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680081 + ... + 2680096.

Almost surely, 2^42881416 is an apocalyptic number.

It is an amenable number.

42881416 is a deficient number, since it is larger than the sum of its proper divisors (37521254).

42881416 is a wasteful number, since it uses less digits than its factorization.

42881416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360183 (or 5360179 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 42881416 is about 6548.3903365636. The cubic root of 42881416 is about 350.0174576326.

The spelling of 42881416 in words is "forty-two million, eight hundred eighty-one thousand, four hundred sixteen".