4551990 has 16 divisors (see below), whose sum is σ = 10924848. Its totient is φ = 1213856.

The previous prime is 4551983. The next prime is 4552019. The reversal of 4551990 is 991554.

It is a super-2 number, since 2×4551990² = 41441225920200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 75837 + ... + 75896.

It is an arithmetic number, because the mean of its divisors is an integer number (682803).

Almost surely, 2^4551990 is an apocalyptic number.

4551990 is an abundant number, since it is smaller than the sum of its proper divisors (6372858).

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

4551990 is a wasteful number, since it uses less digits than its factorization.

4551990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151743.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 4551990 is about 2133.5393129727. The cubic root of 4551990 is about 165.7297339231.

The spelling of 4551990 in words is "four million, five hundred fifty-one thousand, nine hundred ninety".