61438 has 16 divisors (see below), whose sum is σ = 105840. Its totient is φ = 26496.

The previous prime is 61417. The next prime is 61441. The reversal of 61438 is 83416.

61438 is nontrivially palindromic in base 16.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (6615).

2⁶¹⁴³⁸ is an apocalyptic number.

61438 is a deficient number, since it is larger than the sum of its proper divisors (44402).

61438 is a wasteful number, since it uses less digits than its factorization.

61438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171.

The product of its digits is 576, while the sum is 22.

The square root of 61438 is about 247.8668997668. The cubic root of 61438 is about 39.4589650228.

Subtracting from 61438 its sum of digits (22), we obtain a palindrome (61416).

It can be divided in two parts, 614 and 38, that multiplied together give a palindrome (23332).

The spelling of 61438 in words is "sixty-one thousand, four hundred thirty-eight".