54955990 has 16 divisors (see below), whose sum is σ = 101334240. Its totient is φ = 21446080.

The previous prime is 54955973. The next prime is 54955991. The reversal of 54955990 is 9955945.

It is a self number, because there is not a number n which added to its sum of digits gives 54955990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54955991) 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, 66610 + ... + 67429.

It is an arithmetic number, because the mean of its divisors is an integer number (6333390).

Almost surely, 2^54955990 is an apocalyptic number.

54955990 is a deficient number, since it is larger than the sum of its proper divisors (46378250).

54955990 is a wasteful number, since it uses less digits than its factorization.

54955990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134087.

The product of its (nonzero) digits is 364500, while the sum is 46.

The square root of 54955990 is about 7413.2307396978. The cubic root of 54955990 is about 380.1937838948.

It can be divided in two parts, 54955 and 990, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 54955990 in words is "fifty-four million, nine hundred fifty-five thousand, nine hundred ninety".