55857432 has 64 divisors (see below), whose sum is σ = 148884480. Its totient is φ = 17422592.

The previous prime is 55857421. The next prime is 55857463. The reversal of 55857432 is 23475855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24868 + ... + 27020.

It is an arithmetic number, because the mean of its divisors is an integer number (2326320).

Almost surely, 2^55857432 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 55857432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74442240).

55857432 is an abundant number, since it is smaller than the sum of its proper divisors (93027048).

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

55857432 is a wasteful number, since it uses less digits than its factorization.

55857432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232 (or 2228 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The square root of 55857432 is about 7473.7829778500. The cubic root of 55857432 is about 382.2612906753.

The spelling of 55857432 in words is "fifty-five million, eight hundred fifty-seven thousand, four hundred thirty-two".