42063778 has 12 divisors (see below), whose sum is σ = 64473462. Its totient is φ = 20582240.

The previous prime is 42063767. The next prime is 42063779. The reversal of 42063778 is 87736024.

It can be written as a sum of positive squares in only one way, i.e., 36759969 + 5303809 = 6063^2 + 2303^2 .

It is a super-2 number, since 2×42063778² = 3538722839266568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42063779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 343 + ... + 9178.

Almost surely, 2^42063778 is an apocalyptic number.

42063778 is a deficient number, since it is larger than the sum of its proper divisors (22409684).

42063778 is an equidigital number, since it uses as much as digits as its factorization.

42063778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9617 (or 9570 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42063778 is about 6485.6594113475. The cubic root of 42063778 is about 347.7785231442.

The spelling of 42063778 in words is "forty-two million, sixty-three thousand, seven hundred seventy-eight".