55840730 has 32 divisors (see below), whose sum is σ = 110419200. Its totient is φ = 20163520.

The previous prime is 55840721. The next prime is 55840739. The reversal of 55840730 is 3704855.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55840721) and next prime (55840739).

It is a super-3 number, since 3×55840730³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55840739) 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, 14687 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (3450600).

Almost surely, 2^55840730 is an apocalyptic number.

55840730 is a deficient number, since it is larger than the sum of its proper divisors (54578470).

55840730 is a wasteful number, since it uses less digits than its factorization.

55840730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 55840730 is about 7472.6655217533. The cubic root of 55840730 is about 382.2231867364.

The spelling of 55840730 in words is "fifty-five million, eight hundred forty thousand, seven hundred thirty".