55040690 has 16 divisors (see below), whose sum is σ = 99513792. Its totient is φ = 21918384.

The previous prime is 55040677. The next prime is 55040723. The reversal of 55040690 is 9604055.

It is a super-2 number, since 2×55040690² = 6058955111352200, 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, 9854 + ... + 14393.

It is an arithmetic number, because the mean of its divisors is an integer number (6219612).

Almost surely, 2^55040690 is an apocalyptic number.

55040690 is a deficient number, since it is larger than the sum of its proper divisors (44473102).

55040690 is a wasteful number, since it uses less digits than its factorization.

55040690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24481.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 55040690 is about 7418.9412991343. The cubic root of 55040690 is about 380.3890060707.

The spelling of 55040690 in words is "fifty-five million, forty thousand, six hundred ninety".