550961400 has 144 divisors (see below), whose sum is σ = 1877614200. Its totient is φ = 133548800.

The previous prime is 550961393. The next prime is 550961407. The reversal of 550961400 is 4169055.

It is an interprime number because it is at equal distance from previous prime (550961393) and next prime (550961407).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550961407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 68806 + ... + 76394.

Almost surely, 2^550961400 is an apocalyptic number.

550961400 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 550961400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938807100).

550961400 is an abundant number, since it is smaller than the sum of its proper divisors (1326652800).

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

550961400 is a wasteful number, since it uses less digits than its factorization.

550961400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630 (or 7610 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 550961400 is about 23472.5669665676. The cubic root of 550961400 is about 819.7983839042.

The spelling of 550961400 in words is "five hundred fifty million, nine hundred sixty-one thousand, four hundred".