61996040 has 64 divisors (see below), whose sum is σ = 147571200. Its totient is φ = 23392512.

The previous prime is 61996027. The next prime is 61996043. The reversal of 61996040 is 4069916.

61996040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61996043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72254 + ... + 73106.

It is an arithmetic number, because the mean of its divisors is an integer number (2305800).

Almost surely, 2^61996040 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 61996040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73785600).

61996040 is an abundant number, since it is smaller than the sum of its proper divisors (85575160).

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

61996040 is a wasteful number, since it uses less digits than its factorization.

61996040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 61996040 is about 7873.7564097450. The cubic root of 61996040 is about 395.7807343097.

The spelling of 61996040 in words is "sixty-one million, nine hundred ninety-six thousand, forty".