55761420 has 192 divisors, whose sum is σ = 188084736. Its totient is φ = 12165120.

The previous prime is 55761401. The next prime is 55761421. The reversal of 55761420 is 2416755.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55761421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 574812 + ... + 574908.

It is an arithmetic number, because the mean of its divisors is an integer number (979608).

Almost surely, 2^55761420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55761420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94042368).

55761420 is an abundant number, since it is smaller than the sum of its proper divisors (132323316).

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

55761420 is a wasteful number, since it uses less digits than its factorization.

55761420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55761420 is about 7467.3569621386. The cubic root of 55761420 is about 382.0421451449.

It can be divided in two parts, 5576 and 1420, that added together give a palindrome (6996).

The spelling of 55761420 in words is "fifty-five million, seven hundred sixty-one thousand, four hundred twenty".