55290732 has 96 divisors (see below), whose sum is σ = 161280000. Its totient is φ = 14376960.

The previous prime is 55290731. The next prime is 55290751. The reversal of 55290732 is 23709255.

It is a junction number, because it is equal to n+sod(n) for n = 55290693 and 55290702.

It is not an unprimeable number, because it can be changed into a prime (55290731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43644 + ... + 44892.

It is an arithmetic number, because the mean of its divisors is an integer number (1680000).

Almost surely, 2^55290732 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 55290732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80640000).

55290732 is an abundant number, since it is smaller than the sum of its proper divisors (105989268).

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

55290732 is a wasteful number, since it uses less digits than its factorization.

55290732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 55290732 is about 7435.7737996795. The cubic root of 55290732 is about 380.9641536669.

Adding to 55290732 its reverse (23709255), we get a palindrome (78999987).

The spelling of 55290732 in words is "fifty-five million, two hundred ninety thousand, seven hundred thirty-two".