55784570 has 16 divisors (see below), whose sum is σ = 105697440. Its totient is φ = 21139344.

The previous prime is 55784543. The next prime is 55784581. The reversal of 55784570 is 7548755.

It is a super-2 number, since 2×55784570² = 6223836500169800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146612 + ... + 146991.

It is an arithmetic number, because the mean of its divisors is an integer number (6606090).

Almost surely, 2^55784570 is an apocalyptic number.

55784570 is a deficient number, since it is larger than the sum of its proper divisors (49912870).

55784570 is a wasteful number, since it uses less digits than its factorization.

55784570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293629.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 55784570 is about 7468.9068811975. The cubic root of 55784570 is about 382.0950075721.

The spelling of 55784570 in words is "fifty-five million, seven hundred eighty-four thousand, five hundred seventy".