61964388 has 72 divisors (see below), whose sum is σ = 167626368. Its totient is φ = 19231488.

The previous prime is 61964321. The next prime is 61964389. The reversal of 61964388 is 88346916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61964389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62545 + ... + 63527.

It is an arithmetic number, because the mean of its divisors is an integer number (2328144).

Almost surely, 2^61964388 is an apocalyptic number.

61964388 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61964388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83813184).

61964388 is an abundant number, since it is smaller than the sum of its proper divisors (105661980).

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

61964388 is a wasteful number, since it uses less digits than its factorization.

61964388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1108 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 61964388 is about 7871.7461849325. The cubic root of 61964388 is about 395.7133677256.

The spelling of 61964388 in words is "sixty-one million, nine hundred sixty-four thousand, three hundred eighty-eight".