42453638 has 16 divisors (see below), whose sum is σ = 67314240. Its totient is φ = 20025000.

The previous prime is 42453637. The next prime is 42453667. The reversal of 42453638 is 83635424.

It is a super-2 number, since 2×42453638² = 3604622758870088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42453598 and 42453607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42453637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7313 + ... + 11763.

It is an arithmetic number, because the mean of its divisors is an integer number (4207140).

Almost surely, 2^42453638 is an apocalyptic number.

42453638 is a deficient number, since it is larger than the sum of its proper divisors (24860602).

42453638 is a wasteful number, since it uses less digits than its factorization.

42453638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723.

The product of its digits is 69120, while the sum is 35.

The square root of 42453638 is about 6515.6456318618. The cubic root of 42453638 is about 348.8496600712.

The spelling of 42453638 in words is "forty-two million, four hundred fifty-three thousand, six hundred thirty-eight".