549990400 has 156 divisors (see below), whose sum is σ = 1407738024. Its totient is φ = 212992000.

The previous prime is 549990377. The next prime is 549990433. The reversal of 549990400 is 4099945.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4198335 + ... + 4198465.

Almost surely, 2^549990400 is an apocalyptic number.

549990400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549990400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703869012).

549990400 is an abundant number, since it is smaller than the sum of its proper divisors (857747624).

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

549990400 is a wasteful number, since it uses less digits than its factorization.

549990400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 549990400 is about 23451.8741255363. The cubic root of 549990400 is about 819.3165036128.

The spelling of 549990400 in words is "five hundred forty-nine million, nine hundred ninety thousand, four hundred".