1228475550 has 24 divisors (see below), whose sum is σ = 3046619736. Its totient is φ = 327593440.

The previous prime is 1228475531. The next prime is 1228475561. The reversal of 1228475550 is 555748221.

It is a junction number, because it is equal to n+sod(n) for n = 1228475499 and 1228475508.

It is a congruent number.

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, 4094769 + ... + 4095068.

It is an arithmetic number, because the mean of its divisors is an integer number (126942489).

Almost surely, 2^1228475550 is an apocalyptic number.

1228475550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228475550 is an abundant number, since it is smaller than the sum of its proper divisors (1818144186).

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

1228475550 is a wasteful number, since it uses less digits than its factorization.

1228475550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8189852 (or 8189847 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 39.

The square root of 1228475550 is about 35049.6155471069. The cubic root of 1228475550 is about 1070.9984420761.

The spelling of 1228475550 in words is "one billion, two hundred twenty-eight million, four hundred seventy-five thousand, five hundred fifty".