61908736 has 72 divisors (see below), whose sum is σ = 132451200. Its totient is φ = 28815360.

The previous prime is 61908727. The next prime is 61908739. The reversal of 61908736 is 63780916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61908739) 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, 230010 + ... + 230278.

It is an arithmetic number, because the mean of its divisors is an integer number (1839600).

Almost surely, 2^61908736 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 61908736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66225600).

61908736 is an abundant number, since it is smaller than the sum of its proper divisors (70542464).

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

61908736 is a wasteful number, since it uses less digits than its factorization.

61908736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 61908736 is about 7868.2104699862. The cubic root of 61908736 is about 395.5948650540.

The spelling of 61908736 in words is "sixty-one million, nine hundred eight thousand, seven hundred thirty-six".