61928940 has 48 divisors (see below), whose sum is σ = 174746880. Its totient is φ = 16386240.

The previous prime is 61928929. The next prime is 61928957. The reversal of 61928940 is 4982916.

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, 3921 + ... + 11799.

It is an arithmetic number, because the mean of its divisors is an integer number (3640560).

Almost surely, 2^61928940 is an apocalyptic number.

61928940 is a gapful number since it is divisible by the number (60) 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 61928940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87373440).

61928940 is an abundant number, since it is smaller than the sum of its proper divisors (112817940).

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

61928940 is a wasteful number, since it uses less digits than its factorization.

61928940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022 (or 8020 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 61928940 is about 7869.4942658344. The cubic root of 61928940 is about 395.6378946804.

The spelling of 61928940 in words is "sixty-one million, nine hundred twenty-eight thousand, nine hundred forty".