55077330 has 128 divisors (see below), whose sum is σ = 167049216. Its totient is φ = 11289600.

The previous prime is 55077329. The next prime is 55077377. The reversal of 55077330 is 3377055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 260925 + ... + 261135.

It is an arithmetic number, because the mean of its divisors is an integer number (1305072).

Almost surely, 2^55077330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55077330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83524608).

55077330 is an abundant number, since it is smaller than the sum of its proper divisors (111971886).

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

55077330 is a wasteful number, since it uses less digits than its factorization.

55077330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 11025, while the sum is 30.

The square root of 55077330 is about 7421.4102433432. The cubic root of 55077330 is about 380.4733943154.

The spelling of 55077330 in words is "fifty-five million, seventy-seven thousand, three hundred thirty".