55082040 has 256 divisors, whose sum is σ = 197406720. Its totient is φ = 12165120.

The previous prime is 55082017. The next prime is 55082047. The reversal of 55082040 is 4028055.

It is a super-2 number, since 2×55082040² = 6068062261123200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55082040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55082047) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 822087 + ... + 822153.

It is an arithmetic number, because the mean of its divisors is an integer number (771120).

Almost surely, 2^55082040 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 55082040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98703360).

55082040 is an abundant number, since it is smaller than the sum of its proper divisors (142324680).

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

55082040 is a wasteful number, since it uses less digits than its factorization.

55082040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 55082040 is about 7421.7275616934. The cubic root of 55082040 is about 380.4842395434.

The spelling of 55082040 in words is "fifty-five million, eighty-two thousand, forty".