42897408 has 52 divisors (see below), whose sum is σ = 114411888. Its totient is φ = 14295040.

The previous prime is 42897347. The next prime is 42897431. The reversal of 42897408 is 80479824.

It is a super-2 number, since 2×42897408² = 3680375226236928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42897408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10543 + ... + 14033.

Almost surely, 2^42897408 is an apocalyptic number.

42897408 is a gapful number since it is divisible by the number (48) 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 42897408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57205944).

42897408 is an abundant number, since it is smaller than the sum of its proper divisors (71514480).

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

42897408 is an equidigital number, since it uses as much as digits as its factorization.

42897408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3496 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 42897408 is about 6549.6112861757. The cubic root of 42897408 is about 350.0609635303.

The spelling of 42897408 in words is "forty-two million, eight hundred ninety-seven thousand, four hundred eight".