1553406228 has 144 divisors (see below), whose sum is σ = 4580520000. Its totient is φ = 454386240.

The previous prime is 1553406227. The next prime is 1553406233. The reversal of 1553406228 is 8226043551.

1553406228 is a `hidden beast` number, since 1 + 553 + 40 + 62 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1553406192 and 1553406201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553406227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376923 + ... + 381021.

Almost surely, 2^1553406228 is an apocalyptic number.

1553406228 is a gapful number since it is divisible by the number (18) 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 1553406228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2290260000).

1553406228 is an abundant number, since it is smaller than the sum of its proper divisors (3027113772).

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

1553406228 is a wasteful number, since it uses less digits than its factorization.

1553406228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163 (or 4144 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1553406228 is about 39413.2747687882. The cubic root of 1553406228 is about 1158.1416509047.

Adding to 1553406228 its reverse (8226043551), we get a palindrome (9779449779).

The spelling of 1553406228 in words is "one billion, five hundred fifty-three million, four hundred six thousand, two hundred twenty-eight".