554640 has 40 divisors (see below), whose sum is σ = 1720128. Its totient is φ = 147840.

The previous prime is 554639. The next prime is 554641. The reversal of 554640 is 46455.

It is an interprime number because it is at equal distance from previous prime (554639) and next prime (554641).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 554640.

It is not an unprimeable number, because it can be changed into a prime (554641) 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, 916 + ... + 1395.

2⁵⁵⁴⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

554640 is an abundant number, since it is smaller than the sum of its proper divisors (1165488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

554640 is a wasteful number, since it uses less digits than its factorization.

554640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 554640 is about 744.7415659140. The cubic root of 554640 is about 82.1618852309.

Adding to 554640 its product of nonzero digits (2400), we get a triangular number (557040 = T₁₀₅₅).

It can be divided in two parts, 5 and 54640, that added together give a palindrome (54645).

The spelling of 554640 in words is "five hundred fifty-four thousand, six hundred forty".