4540090 has 8 divisors (see below), whose sum is σ = 8172180. Its totient is φ = 1816032.

The previous prime is 4540079. The next prime is 4540091. The reversal of 4540090 is 900454.

It can be written as a sum of positive squares in 2 ways, for example, as 4092529 + 447561 = 2023^2 + 669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×4540090² = 41224834416200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4540091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226995 + ... + 227014.

Almost surely, 2^4540090 is an apocalyptic number.

4540090 is a deficient number, since it is larger than the sum of its proper divisors (3632090).

4540090 is a wasteful number, since it uses less digits than its factorization.

4540090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454016.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4540090 is about 2130.7486947080. The cubic root of 4540090 is about 165.5851887225.

It can be divided in two parts, 45 and 40090, that multiplied together give a triangular number (1804050 = T₁₈₉₉).

The spelling of 4540090 in words is "four million, five hundred forty thousand, ninety".