55140736 has 128 divisors (see below), whose sum is σ = 137088000. Its totient is φ = 21565440.

The previous prime is 55140731. The next prime is 55140737. The reversal of 55140736 is 63704155.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 55140698 and 55140707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55140731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697945 + ... + 698023.

It is an arithmetic number, because the mean of its divisors is an integer number (1071000).

Almost surely, 2^55140736 is an apocalyptic number.

55140736 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55140736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68544000).

55140736 is an abundant number, since it is smaller than the sum of its proper divisors (81947264).

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

55140736 is a wasteful number, since it uses less digits than its factorization.

55140736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 55140736 is about 7425.6808442055. The cubic root of 55140736 is about 380.6193408994.

The spelling of 55140736 in words is "fifty-five million, one hundred forty thousand, seven hundred thirty-six".