55857828 has 48 divisors (see below), whose sum is σ = 145212480. Its totient is φ = 16593024.

The previous prime is 55857793. The next prime is 55857839. The reversal of 55857828 is 82875855.

It is a happy number.

55857828 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

55857828 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650 + ... + 10697.

It is an arithmetic number, because the mean of its divisors is an integer number (3025260).

Almost surely, 2^55857828 is an apocalyptic number.

55857828 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

55857828 is an abundant number, since it is smaller than the sum of its proper divisors (89354652).

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

55857828 is a wasteful number, since it uses less digits than its factorization.

55857828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12396 (or 12394 counting only the distinct ones).

The product of its digits is 896000, while the sum is 48.

The square root of 55857828 is about 7473.8094704107. The cubic root of 55857828 is about 382.2621940174.

The spelling of 55857828 in words is "fifty-five million, eight hundred fifty-seven thousand, eight hundred twenty-eight".