61930388 has 54 divisors (see below), whose sum is σ = 125058906. Its totient is φ = 26817024.

The previous prime is 61930387. The next prime is 61930403. The reversal of 61930388 is 88303916.

It can be written as a sum of positive squares in 9 ways, for example, as 29463184 + 32467204 = 5428^2 + 5698^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61930387) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 195206 + ... + 195522.

Almost surely, 2^61930388 is an apocalyptic number.

61930388 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61930388 is an abundant number, since it is smaller than the sum of its proper divisors (63128518).

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

61930388 is a wasteful number, since it uses less digits than its factorization.

61930388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 61930388 is about 7869.5862661261. The cubic root of 61930388 is about 395.6409782103.

The spelling of 61930388 in words is "sixty-one million, nine hundred thirty thousand, three hundred eighty-eight".