55374540 has 144 divisors (see below), whose sum is σ = 173150208. Its totient is φ = 13208832.

The previous prime is 55374521. The next prime is 55374581. The reversal of 55374540 is 4547355.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 435957 + ... + 436083.

It is an arithmetic number, because the mean of its divisors is an integer number (1202432).

Almost surely, 2^55374540 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 55374540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86575104).

55374540 is an abundant number, since it is smaller than the sum of its proper divisors (117775668).

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

55374540 is a wasteful number, since it uses less digits than its factorization.

55374540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 33.

The square root of 55374540 is about 7441.4071249999. The cubic root of 55374540 is about 381.1565410976.

The spelling of 55374540 in words is "fifty-five million, three hundred seventy-four thousand, five hundred forty".