55690028 has 24 divisors (see below), whose sum is σ = 104266512. Its totient is φ = 25933824.

The previous prime is 55690027. The next prime is 55690067. The reversal of 55690028 is 82009655.

It is a self number, because there is not a number n which added to its sum of digits gives 55690028.

It is not an unprimeable number, because it can be changed into a prime (55690027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 10817.

It is an arithmetic number, because the mean of its divisors is an integer number (4344438).

Almost surely, 2^55690028 is an apocalyptic number.

It is an amenable number.

55690028 is a deficient number, since it is larger than the sum of its proper divisors (48576484).

55690028 is a wasteful number, since it uses less digits than its factorization.

55690028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8561 (or 8559 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 55690028 is about 7462.5751587505. The cubic root of 55690028 is about 381.8790311665.

The spelling of 55690028 in words is "fifty-five million, six hundred ninety thousand, twenty-eight".