1814621428 has 6 divisors (see below), whose sum is σ = 3175587506. Its totient is φ = 907310712.

The previous prime is 1814621423. The next prime is 1814621477. The reversal of 1814621428 is 8241264181.

It can be written as a sum of positive squares in only one way, i.e., 1675428624 + 139192804 = 40932^2 + 11798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814621423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226827675 + ... + 226827682.

Almost surely, 2^1814621428 is an apocalyptic number.

It is an amenable number.

1814621428 is a deficient number, since it is larger than the sum of its proper divisors (1360966078).

1814621428 is a wasteful number, since it uses less digits than its factorization.

1814621428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453655361 (or 453655359 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 1814621428 is about 42598.3735370260. The cubic root of 1814621428 is about 1219.7252422558.

The spelling of 1814621428 in words is "one billion, eight hundred fourteen million, six hundred twenty-one thousand, four hundred twenty-eight".