55761930 has 96 divisors (see below), whose sum is σ = 168524928. Its totient is φ = 12528000.

The previous prime is 55761929. The next prime is 55761931. The reversal of 55761930 is 3916755.

It is a happy number.

55761930 is a `hidden beast` number, since 5 + 5 + 7 + 619 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (55761929) and next prime (55761931).

It is not an unprimeable number, because it can be changed into a prime (55761931) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37705 + ... + 39155.

It is an arithmetic number, because the mean of its divisors is an integer number (1755468).

Almost surely, 2^55761930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55761930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84262464).

55761930 is an abundant number, since it is smaller than the sum of its proper divisors (112762998).

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

55761930 is a wasteful number, since it uses less digits than its factorization.

55761930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 55761930 is about 7467.3911106892. The cubic root of 55761930 is about 382.0433098744.

The spelling of 55761930 in words is "fifty-five million, seven hundred sixty-one thousand, nine hundred thirty".