55897650 has 72 divisors (see below), whose sum is σ = 155061504. Its totient is φ = 14421600.

The previous prime is 55897643. The next prime is 55897651. The reversal of 55897650 is 5679855.

55897650 is a `hidden beast` number, since 5 + 589 + 7 + 65 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 55897596 and 55897605.

It is not an unprimeable number, because it can be changed into a prime (55897651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11947 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (2153632).

Almost surely, 2^55897650 is an apocalyptic number.

55897650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55897650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77530752).

55897650 is an abundant number, since it is smaller than the sum of its proper divisors (99163854).

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

55897650 is a wasteful number, since it uses less digits than its factorization.

55897650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056 (or 4048 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 55897650 is about 7476.4730989953. The cubic root of 55897650 is about 382.3530128553.

The spelling of 55897650 in words is "fifty-five million, eight hundred ninety-seven thousand, six hundred fifty".