1228658774 has 16 divisors (see below), whose sum is σ = 2174217216. Its totient is φ = 509581800.

The previous prime is 1228658759. The next prime is 1228658777. The reversal of 1228658774 is 4778568221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228658777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1415072 + ... + 1415939.

It is an arithmetic number, because the mean of its divisors is an integer number (135888576).

Almost surely, 2^1228658774 is an apocalyptic number.

1228658774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1228658774 is a deficient number, since it is larger than the sum of its proper divisors (945558442).

1228658774 is a wasteful number, since it uses less digits than its factorization.

1228658774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831051.

The product of its digits is 1505280, while the sum is 50.

The square root of 1228658774 is about 35052.2292301075. The cubic root of 1228658774 is about 1071.0516849926.

The spelling of 1228658774 in words is "one billion, two hundred twenty-eight million, six hundred fifty-eight thousand, seven hundred seventy-four".