1234421628 has 48 divisors (see below), whose sum is σ = 3172705536. Its totient is φ = 370431360.

The previous prime is 1234421623. The next prime is 1234421647. The reversal of 1234421628 is 8261244321.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234421623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31801 + ... + 58992.

It is an arithmetic number, because the mean of its divisors is an integer number (66098032).

Almost surely, 2^1234421628 is an apocalyptic number.

It is an amenable number.

1234421628 is an abundant number, since it is smaller than the sum of its proper divisors (1938283908).

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

1234421628 is a wasteful number, since it uses less digits than its factorization.

1234421628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90914 (or 90912 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 1234421628 is about 35134.3368800380. The cubic root of 1234421628 is about 1072.7236136452.

Adding to 1234421628 its reverse (8261244321), we get a palindrome (9495665949).

The spelling of 1234421628 in words is "one billion, two hundred thirty-four million, four hundred twenty-one thousand, six hundred twenty-eight".