61628138 has 16 divisors (see below), whose sum is σ = 108603936. Its totient is φ = 25857840.

The previous prime is 61628131. The next prime is 61628143. The reversal of 61628138 is 83182616.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61628098 and 61628107.

It is not an unprimeable number, because it can be changed into a prime (61628131) 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, 107456 + ... + 108027.

It is an arithmetic number, because the mean of its divisors is an integer number (6787746).

Almost surely, 2^61628138 is an apocalyptic number.

61628138 is a deficient number, since it is larger than the sum of its proper divisors (46975798).

61628138 is a wasteful number, since it uses less digits than its factorization.

61628138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215509.

The product of its digits is 13824, while the sum is 35.

The square root of 61628138 is about 7850.3591000667. The cubic root of 61628138 is about 394.9962890214.

The spelling of 61628138 in words is "sixty-one million, six hundred twenty-eight thousand, one hundred thirty-eight".