61700140 has 48 divisors (see below), whose sum is σ = 138801600. Its totient is φ = 22956032.

The previous prime is 61700131. The next prime is 61700153. The reversal of 61700140 is 4100716.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29241 + ... + 31279.

It is an arithmetic number, because the mean of its divisors is an integer number (2891700).

Almost surely, 2^61700140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61700140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69400800).

61700140 is an abundant number, since it is smaller than the sum of its proper divisors (77101460).

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

61700140 is a wasteful number, since it uses less digits than its factorization.

61700140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 61700140 is about 7854.9436662525. The cubic root of 61700140 is about 395.1500578189.

Adding to 61700140 its reverse (4100716), we get a palindrome (65800856).

The spelling of 61700140 in words is "sixty-one million, seven hundred thousand, one hundred forty".