61929380 has 24 divisors (see below), whose sum is σ = 130216632. Its totient is φ = 24740352.

The previous prime is 61929377. The next prime is 61929389. The reversal of 61929380 is 8392916.

It can be written as a sum of positive squares in 4 ways, for example, as 19731364 + 42198016 = 4442^2 + 6496^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61929389) 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, 20444 + ... + 23276.

It is an arithmetic number, because the mean of its divisors is an integer number (5425693).

Almost surely, 2^61929380 is an apocalyptic number.

It is an amenable number.

61929380 is an abundant number, since it is smaller than the sum of its proper divisors (68287252).

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

61929380 is a wasteful number, since it uses less digits than its factorization.

61929380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935 (or 3933 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 61929380 is about 7869.5222218379. The cubic root of 61929380 is about 395.6388316697.

The spelling of 61929380 in words is "sixty-one million, nine hundred twenty-nine thousand, three hundred eighty".