55647730 has 8 divisors (see below), whose sum is σ = 100165932. Its totient is φ = 22259088.

The previous prime is 55647727. The next prime is 55647733. The reversal of 55647730 is 3774655.

It is an interprime number because it is at equal distance from previous prime (55647727) and next prime (55647733).

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 1962801 = 7327^2 + 1401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55647730.

It is not an unprimeable number, because it can be changed into a prime (55647733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782377 + ... + 2782396.

Almost surely, 2^55647730 is an apocalyptic number.

55647730 is a deficient number, since it is larger than the sum of its proper divisors (44518202).

55647730 is a wasteful number, since it uses less digits than its factorization.

55647730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564780.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 55647730 is about 7459.7406121125. The cubic root of 55647730 is about 381.7823243829.

The spelling of 55647730 in words is "fifty-five million, six hundred forty-seven thousand, seven hundred thirty".